Crossword Genius

A partner each and every year (4)

Ross

I believe the answer is:

ally

'a partner' is the definition.
(thesaurus)

'each and every year' is the wordplay.
'each and every' becomes 'all' (I've seen this before).
'year' becomes 'y'.
'all'+'y'='ALLY'

(Other definitions for ally that I've seen before include "Team up" , "Friend and colleague" , "Cooperating country" , "Friend in time of need" , "Join by marriage, treaty etc" .)

I've seen this clue in The Times.
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