Carpentry peg (5)
I believe the answer is:
dowel
'carpentry peg' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for dowel that I've seen before include "Peg to hold two pieces together" , "Headless peg used for joining components" , "Peg for joining wood" , "Wooden pin used in carpentry" , "Lowed (anag.)" .)