Will it stop houses going up though? (5)
I believe the answer is:
still
'though?' is the definition.
(thesaurus)
'will it stop houses going up' is the wordplay.
'houses' indicates the answer is hidden within the clue (part of the clue houses the answer).
'going up' says the letters should be written backwards (in a down clue, the letters are written upwards).
'llits' is hidden in the letters of 'will it stop'.
'llits' in reverse letter order is 'STILL'.
(Other definitions for still that I've seen before include "Where to make spirits" , "Stationary" , "gentle" , "in spite of this" , "Always" .)