Little Rock (3)

I believe the answer is:

gib

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This clue might be a double definition.

'little' is the first definition.
Both the answer and definition are singular nouns.
Perhaps there's an association between them I don't understand?

'rock' is the second definition.
(both are nicknames for Gibraltar)

Can you help me to learn more?

(Another definition for gib that I've seen is " The Rock".)

I've seen this clue in the Evening Standard.

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