Here are some things to keep in mind if you sre a single woman searching for a man who might want a Taken In Hand relationship -
First, looking for men who seem to be natural leaders is definitely a good start. Don't confuse pushiness for strength, however—look for men who people follow because they trust him as a leader, not because he is simply in a position of authority and doesn't let them forget it. Taken in Hand women seem to seek strong men, not just people who like having power... If that's true for you, make sure you know the difference.
Don't think that a lack of pushiness equates to a lack of desire for consensual control in an intimate relationship. Especially in modern Western society, men have to be very careful to avoid being seen as "pushy" for professional reasons as well as romantic ones. As male dominance is so frowned on, a man could very well be Taken in Hand material and simply not realize it.
Old-fashioned chivalry is a good indicator as well. It is becoming somewhat unacceptable to do things like open doors for women... and so a man who does such things anyway is effectively saying "I don't care what society says, I treat ladies like ladies." For those who enjoy that dynamic this kind of chivalry is something to look for.
See if he'll make the first move, while encouraging him. You'll need to strike a balance here if you want to find out how much of a take-charge kind of guy your prospective partner is. You should err on the side of caution here, however—if you want him to make the first move all the time and don't let him know that you are interested in him, he will very likely take that as a sign of disinterest and move on.
Ask for his advice. A man who is suitable for a Taken in Hand relationship will be happy to help someone they care about work out the tough problems in their life. It's perfectly acceptable to ask a friend or companion for advice, and this will also likely be a turn on for the guy if he really is interested in a Taken in Hand relationship.
Be cheerfully deferential at least once in a while, and see how he reacts to that! If Taken In Hand really is his thing, you should see some kind of positive reaction... although it may take a few tries.
So there you go! That's all the advice I can think of at the moment. Feel free to add more, or ask a question if you're curious about something.