Candour finds street buried in nectar (7)
I believe the answer is:
honesty
'candour' is the definition.
(I've seen this before)
'street buried in nectar' is the wordplay.
'street' becomes 'st' (abbreviation).
'buried in' means one lot of letters goes inside another (inserted letters get buried).
'nectar' becomes 'honey' (I've seen this before).
'st' put inside 'honey' is 'HONESTY'.
'finds' acts as a link.
(Other definitions for honesty that I've seen before include "Probity; plant" , "Candour" , "Plant; truthfulness" , "Integrity" , "that's easily cultivated" .)