Evita eats out to pass the summer (9)
I believe the answer is:
aestivate
'pass the summer' is the definition.
(I've seen this before)
'evita eats out' is the wordplay.
'out' is an anagram indicator (out can mean wrong or inaccurate).
'evita'+'eats'='evitaeats'
'evitaeats' with letters rearranged gives 'AESTIVATE'.
'to' is the link.
(Other definitions for aestivate that I've seen before include "Pass the summer" , "Spend summer inactively" .)