Impress cousins tiling houses (6)
I believe the answer is:
instil
'impress' is the definition.
(I've seen this before)
'cousins tiling houses' is the wordplay.
'houses' says the answer is hidden in the clue (part of the clue houses the answer).
'INSTIL' is hidden in the letters of 'cousins tiling'.
(Other definitions for instil that I've seen before include "Implant (in the mind)" , "Introduce into mind, being in list" , "Inject ideas into mind" , "Impress" , "Gradually establish (in someone's mind)" .)