Light touch in work is splendid (4)
I believe the answer is:
kiss
'light touch' is the definition.
(thesaurus)
'in work is splendid' is the wordplay.
'in' indicates the answer is hidden within the clue.
'KISS' is hidden in the letters of 'work is splendid'.
(Other definitions for kiss that I've seen before include "Gentle touch of the lips" , "Act of osculation" , "Neck - peck" , "Smack; peck" , "Amorous greeting" .)