Inexperienced in fine workmanship (3)
I believe the answer is:
new
'inexperienced' is the definition.
(similar in meaning)
'in fine workmanship' is the wordplay.
'in' indicates a hidden word.
'NEW' can be found hidden inside 'fine workmanship'.
(Other definitions for new that I've seen before include "Not previously used" , "and 28 and 29: The 365th day" , "Modern" , "Unconventional" , "Recently made, etc" .)