Where builders can rest when quite finished (4)
I believe the answer is:
site
'where' is the definition.
(thesaurus)
'builders can rest when quite finished' is the wordplay.
I cannot really see how this works, but
'rest' could be 'sit' (I've seen this before) and 'sit' is found within the answer.
'when' could be 'e' (I've seen this in other clues) and 'e' is found in the answer.
No letters remain.
This explanation may well be incorrect...
Can you help me to learn more?
(Other definitions for site that I've seen before include "Ties into building location" , "Area set aside for building" , "Whereabouts" , "internet location" , "Locality" .)