Nothing found in unusually labile plant (7)
I believe the answer is:
lobelia
'plant' is the definition.
(lobelia is a kind of plant)
'nothing found in unusually labile' is the wordplay.
'nothing' becomes 'o' (looks like zero - 0).
'found in' is an insertion indicator.
'unusually' indicates an anagram.
'labile' is an anagram of 'lbelia'.
'o' going within 'lbelia' is 'LOBELIA'.
(Other definitions for lobelia that I've seen before include "Herbaceous plant - boil ale (anag)" , "Oilable (anag)" , "Bloomer" , "Oil bale (anag) - flower" , "something flowery" .)