A little skill involved in work (6)
I believe the answer is:
partly
'a little' is the definition.
(just a little bit)
'skill involved in work' is the wordplay.
'skill' becomes 'art' (both can mean a talent).
'involved in' means one lot of letters goes inside another.
'work' becomes 'ply' (to ply a trade is to work at it).
'art' going within 'ply' is 'PARTLY'.
(Other definitions for partly that I've seen before include "Not quite" , "Somewhat" , "'In some degree, not wholly (6)'" , "to a certain degree" , "To some extent, not wholly" .)