Crossword Genius

The complaint of a fathead, always? (5)

Ross

I believe the answer is:

fever

'the complaint' is the definition.

'fathead always?' is the wordplay.
'fathead' becomes 'f' (head letter of 'fat').
'always?' becomes 'ever' ('ever' can be a synonym of 'always').
'f'+'ever'='FEVER'

'of a' is the link.

(Other definitions for fever that I've seen before include "Reason for temperature" , "Masefield's desire for the sea" , "excited state" , "Intense nervous excitement or anticipation?" , "Excitement; ague" .)

I've seen this clue in the Evening Standard.
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