Crossword Genius

They fly some flag in trouble (10)

Ross

I believe the answer is:

flamingoes

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

'they fly' is the definition.
Although both the answer and 'fly' are nouns, they are not in the same form of the noun.

'some flag in trouble' is the wordplay.
'trouble' indicates anagramming the letters.
'some'+'flag'+'in'='someflagin'
'someflagin' is an anagram of 'FLAMINGOES'.

Can you help me to learn more?

(Another definition for flamingoes that I've seen is " birds".)

I've seen this clue in The Globe and Mail and The Guardian.
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