Crossword Genius

Something less like a lobster, more like a shrimp (5)

Ross

I believe the answer is:

prawn

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

'shrimp' is the definition.
(I know that shrimp can be written as prawn)

I cannot understand how the remainder of the clue works.

Can you help me to learn more?

(Other definitions for prawn that I've seen before include "Small, edible crustacean" , "basis for cocktail" , "Bit of seafood" , "Large shrimp" , "Marine crustacean" .)

I've seen this clue in the Evening Standard.
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