Pretty girl, maybe a bit squawky (4)

I believe the answer is:

poll

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'pretty girl' is the definition.
Although both the answer and definition are singular nouns, I don't see how they can define each other.

I don't understand the rest of the clue.

Can you help me to learn more?

(Other definitions for poll that I've seen before include "Vote; trim horns" , "voting returns" , "less ambitious students" , "coverage of vote for 9d > [WHISTLE BLOWER]" , "cut" .)

I've seen this clue in the Evening Standard.

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