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A number of mugs holding fish at a Dublin venue (8)

Ross

I believe the answer is:

tankards

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

'a number of mugs' is the definition.
The definition and answer can be both man-made objects as well as being plural nouns.
Perhaps there's a link between them I don't understand?

I can't explain the remainder of the clue.

Can you help me to learn more?

(Other definitions for tankards that I've seen before include "Large beer mugs" , "One-handled beer mugs" , "Large one-handled drinking mugs" , "Large one-handled drinking vessels" .)

I've seen this clue in the Irish Times and the Irish Times (Crosaire).
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