Overblown nature of dahlia mostly the centre of lush head (11)
I believe the answer is:
pompousness
'overblown nature' is the definition.
The answer and definition can be both human attributes as well as being singular nouns.
Perhaps there's an association between them I don't understand?
'dahlia mostly the centre of lush head' is the wordplay.
'dahlia' becomes 'pompon' (I've seen this before).
'mostly' means to remove the last letter (most but not all of the word).
'the centre of' says to take the centre.
'head' becomes 'ness' (ness is a headland).
The middle letters of 'lush' are 'us'.
'pompon' with its last letter taken off is 'pompo'.
'pompo'+'us'+'ness'='POMPOUSNESS'
'of' is the link.
Can you help me to learn more?