Eats when the sun comes out (8)
I believe the answer is:
consumes
'eats' is the definition.
(consuming is a kind of eating)
'the sun comes out' is the wordplay.
'out' indicates an anagram (out can mean wrong or inaccurate).
'sun'+'comes'='suncomes'
'suncomes' is an anagram of 'CONSUMES'.
'when' acts as a link.
(Other definitions for consumes that I've seen before include "Gobbles" , "Eats" .)