Bloomers head's angry about (10)
I believe the answer is:
hydrangeas
'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" .)