Unfriendly: piscatorial? (6)

I believe the answer is:

offish

This clue could be a double definition.

'unfriendly' is the first definition.
(offish can mean aloof or unfriendly)

'piscatorial?' is the second definition.
Although both the answer and definition are adjectives, I don't see how they can define each other.

(Another definition for offish that I've seen is " Aloof, distant in manner".)

I've seen this clue in The Times.

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