Crossword Genius

Given gins, he'll be just as stupid (3)

Ross

I believe the answer is:

mug

I'm a little stuck... Click here to teach me more about this clue!

This could be a double definition.

'given gins he'll' is the first definition.
The answer is a person as well as being a singular noun. This is suggested by the definition.

'just as stupid' is the second definition.
The definition and answer can be both people as well as being singular nouns.
Perhaps there's a link between them I don't understand?

'be' is the link.

Can you help me to learn more?

(Other definitions for mug that I've seen before include "Drinking vessel; dupe" , "A drinking vesel or a slangy victim" , "Gullible type; drinking vessel" , "Fool - drinking vessel" , "Drinking vessel for one easily deceived" .)

I've seen this clue in the Evening Standard.
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