Always fed out hot (7)
I believe the answer is:
fevered
'hot' is the definition.
(thesaurus)
'always fed out' is the wordplay.
'always' becomes 'ever' (synonyms).
'out' means one lot of letters goes inside another.
'ever' put inside 'fed' is 'FEVERED'.
(Other definitions for fevered that I've seen before include "Impatient" , "Highly excited" , "Nervously excited" .)