Some carpenters go in (5)
I believe the answer is:
enter
'go in' is the definition.
(as in entering a building)
'some carpenters' is the wordplay.
'some' indicates the answer is hidden within the clue (some of the parts of the word are used).
'ENTER' is hidden within 'carpenters'.
(Other definitions for enter that I've seen before include "Go in - set down" , "Take part in a contest" , "put in for a race" , "Gain access to" , "Treen (anag.)" .)