Made use of repeatedly peeled guavas TV cook rejected (7)
I believe the answer is:
availed
'made use of' is the definition.
(availing is a kind of making use of)
'repeatedly peeled guavas tv cook rejected' is the wordplay.
'repeatedly peeled guavas tv' becomes 'av' (I am not sure about this - if you are sure you should give a lot more credence to this answer).
'cook' becomes 'delia' (Delia Smith).
'rejected' is a reversal indicator.
'delia' in reverse letter order is 'ailed'.
'av'+'ailed'='AVAILED'
Can you help me to learn more?
(Other definitions for availed that I've seen before include "Helped" , "Used to one's advantage" , "Profited from" , "Used, put into service" .)