Always ate out when it was hot (7)
I believe the answer is:
fevered
'hot' is the definition.
(thesaurus)
'always ate out' is the wordplay.
'always' becomes 'ever' (synonyms).
'ate' becomes 'fed' ('feed' can be a synonym of 'eat').
'out' is an insertion indicator.
'ever' inserted into 'fed' is 'FEVERED'.
'when it was' is the link.
This may not be correct. Some or all of it may belong to another bit of the clue.
Can you help me to learn more?
(Other definitions for fevered that I've seen before include "Nervously excited" , "Impatient" , "Highly excited" .)