Wind tiny bit of orange zest (5)
I believe the answer is:
gusto
'zest' is the definition.
('gusto' can be a synonym of 'zest')
'wind tiny bit of orange' is the wordplay.
'wind' becomes 'gust' (gust is a kind of wind**).
'tiny bit of' says to take the initial letters.
The initial letter of 'orange' is 'o'.
'gust'+'o'='GUSTO'
(Other definitions for gusto that I've seen before include "Relish; vigour" , "Vigorous and enthusiastic enjoyment" , "Energy" , "Obvious enthusiasm" , "Zest, pleasure in action" .)