Crossword Genius

Bloomers head's angry about (10)

Ross

I believe the answer is:

hydrangeas

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'bloomers head's angry about' is the definition.
I can't judge whether this defines the answer.

'head's angry about' is the wordplay.
'about' indicates anagramming the letters.
'heads'+'angry'='headsangry'
'headsangry' is an anagram of 'HYDRANGEAS'.

Can you help me to learn more?

(Other definitions for hydrangeas that I've seen before include "Flowering plants; ashy garden (anag.)" , "Garden shrubs" .)

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