It's eaten by many, if fun is also wanted (6)
I believe the answer is:
muffin
'fun is also wanted' is the definition.
I can't judge whether this definition defines the answer.
'it's eaten by many' is the wordplay.
'it's' becomes 'muff' (I am not sure about this - if you are sure you should give a lot more credence to this answer).
'eaten by' says to take the centre (the letters consumed or eaten by the word).
'many' becomes 'nine' (example).
The middle letters of 'nine' are 'in'.
'muff'+'in'='MUFFIN'
'if' acts as a link.
Can you help me to learn more?
(Other definitions for muffin that I've seen before include "Yeast cake eaten hot" , "Thick roll, usually toasted" , "Toasted, spongy bread roll" , "Round raised cake, often split and toasted" , "Small cake" .)