Hank to his friends, perhaps (5)

I believe the answer is:

henry

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'hank to his friends perhaps' is the definition.
Although both the answer and definition are singular nouns, I don't see how one could define the other.

This is the entire clue.

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(Other definitions for henry that I've seen before include "Best Actor Oscar winner 1981, for 'On Golden Pond'" , "Author of The Turn of the Screw" , "Unit of inductance; man's name" , "- the Navigator, Portuguese prince" , "Name of eight English kings" .)

I've seen this clue in the Evening Standard.

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