Caressing skin is surprisingly good (7)
I believe the answer is:
kissing
'caressing' is the definition.
('kissing' can be a synonym of 'caressing')
'skin is surprisingly good' is the wordplay.
'surprisingly' indicates an anagram.
'good' becomes 'g' (abbreviation).
'skin'+'is'='skinis'
'skinis' anagrammed gives 'kissin'.
'kissin'+'g'='KISSING'
(Other definitions for kissing that I've seen before include "delivering smack" , "Osculation" , "Gently touching" , "Caressing with lips" , "Osculating" .)