One of the watch parts possibly? (5)
I believe the answer is:
strap
'one of the watch' is the definition.
The definition and answer can be both man-made objects as well as being singular nouns.
Perhaps there's an association between them I don't understand?
'parts possibly?' is the wordplay.
'possibly?' indicates anagramming the letters (I've seen 'possibly' mean this).
'parts' is an anagram of 'STRAP'.
Can you help me to learn more?
(Other definitions for strap that I've seen before include "something to hang on to" , "Whip" , "Belt; leather strip" , "Parts of leather belt" , "Leather fastening" .)