Citrus shaving (4)
I believe the answer is:
zest
'citrus shaving' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for zest that I've seen before include "Great energy; citrus peel" , "Keen excitement - citrus peel" , "Zing" , "Piquancy (eg from lemon peel)" , "Relish, enthusiasm" .)