Crossword Genius

RAF agitated with English submarine type? (10)

Ross

I believe the answer is:

anglerfish

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'submarine type?' is the definition.
Although both the answer and definition are singular nouns, I cannot see how they can define each other.

'raf agitated with english' is the wordplay.
'agitated with' is an anagram indicator.
'raf' mixed up with 'english' can make 'ANGLERFISH'.

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I've seen this clue in The Times.
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