Novice misconstrued omen as fruit (5)
I believe the answer is:
lemon
'fruit' is the definition.
(lemon is a kind of fruit)
'novice misconstrued omen' is the wordplay.
'novice' becomes 'l' (abbreviation for Learner e.g. on UK cars).
'misconstrued' indicates anagramming the letters.
'omen' with letters rearranged gives 'emon'.
'l'+'emon'='LEMON'
'as' acts as a link.
(Other definitions for lemon that I've seen before include "Dab" , "Sharp-tasting fruit" , "Feeble thing (colloq.); fruit tree" , "something unattractive" , "Fruit squeezed on Pancake Day?" .)