Crossword Genius

Do they pull tall buildings? (6)

Ross

I believe the answer is:

towers

I'm a little stuck... Click here to teach me more about this clue!

'tall buildings?' is the definition.
(I've seen this before)

'do they pull' is the wordplay.
I cannot really see how this works, but
'pull' could be 'tow' (tow is a kind of pull) and 'tow' is located in the answer.
The remaining letters 'ers' is a valid word which might be clued in a way I don't understand.
This explanation may well be incorrect...

Can you help me to learn more?

(Other definitions for towers that I've seen before include "have some pull" , "Keeps" , "Tall thin structures" , "vehicles for use in breakdowns?" , "Turrets" .)

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