Expert touch (3)
I believe the answer is:
dab
This clue is a double definition.
'expert' is the first definition.
(thesaurus)
'touch' is the second definition.
(dab is a kind of touch)
(Other definitions for dab that I've seen before include "Bad kind of fish" , "Flounder" , "Light stroke" , "Fingerprint - fish" , "A bad sort of little fish" .)