Where builders work and rest at a loose end (4)
I believe the answer is:
site
'where' is the definition.
(thesaurus)
'rest at a loose end' is the wordplay.
'rest' becomes 'sit' (I've seen this in other clues).
'at' says to put letters next to each other.
'end' suggests the final letters.
The last letter of 'loose' is 'e'.
'sit'+'e'='SITE'
'builders work and' is the link.
This may not be correct. Some or all of it may be part of another bit of the clue.
Can you help me to learn more?
(Other definitions for site that I've seen before include "Location or piece of land" , "Location (of building, dig etc)" , "Whereabouts" , "internet location" , "Place for building" .)