Participate with some carpenters (5)
I believe the answer is:
enter
'participate' is the definition.
(I know that participate can be written as enter)
'with some carpenters' is the wordplay.
'with' indicates a hidden word.
'ENTER' can be found hidden inside 'some carpenters'.
(Other definitions for enter that I've seen before include "Inscribe" , "Enlist, join up" , "Fill in" , "Come/go in" , "Gain admission" .)