Fellow, mature, is to cope (6)

I believe the answer is:

manage

'is to cope' is the definition.
(I've seen this before)

'fellow mature' is the wordplay.
'fellow' becomes 'man' (I've seen this before).
'mature' becomes 'age' (synonyms).
'man'+'age'='MANAGE'

(Other definitions for manage that I've seen before include "Control, direct, run" , "Be in charge of something" , "Contrive" , "Take control" , "Run, administer" .)

I've seen this clue in The Times.

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