Will one crow attack queen around lake? (7)

I believe the answer is:

gloater

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'will one crow' is the definition.
The definition suggests a singular noun which matches the answer.

'attack queen around lake?' is the wordplay.
'attack' becomes 'goat' (go at).
'queen' becomes 'ER' (abbreviation for Elizabeth Regina).
'around' indicates putting letters inside.
'lake?' becomes 'L' (geographical abbreviation).
'goat'+'er'='goater'
'goater' enclosing 'l' is 'GLOATER'.

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I've seen this clue in The Independent.

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