Daffodil is self-obsessed (9)
I believe the answer is:
narcissus
'daffodil' is the definition.
(I have seen 'Small daffodil ' mean 'narcissus' so perhaps 'daffodil' could also mean 'narcissus')
'is self-obsessed' is the wordplay.
I cannot really see how this works, but
'is' is present in the answer.
This explanation may well be incorrect...
Can you help me to learn more?
(Other definitions for narcissus that I've seen before include "Vain youth - flower" , "Self-centred youth" , "Who saw himself as winning" , "Flower; Gk. youth in love with reflection" , "Spring flower" .)