Fair enough! (8)

There are a few possibilities for this:

Which length description are you looking for?:

5,5

adequate

I believe this is a double definition.

'fair' is the first definition.
(synonyms)

'enough' is the second definition.
(I know that enough can be written as adequate)

(Other definitions for adequate that I've seen before include "Sufficient, good enough" , "'Satisfactory, acceptable (8)'" , "'Good enough, all right (8)'" , "Enough to meet a purpose" , "up to the job?" .)

I've seen this clue in The Independent.

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