As if Circe can offer surrender! (9)
I believe the answer is:
sacrifice
'offer surrender' is the definition.
'sacrifice' can be an answer for 'surrender' (thesaurus). I'm unsure of the 'offer' bit.
'as if circe can' is the wordplay.
'can' indicates an anagram (I've seen 'canned' mean this (canned can mean drunk)).
'as'+'if'+'circe'='asifcirce'
'asifcirce' with letters rearranged gives 'SACRIFICE'.
Can you help me to learn more?
(Other definitions for sacrifice that I've seen before include "Immolate" , "Ritual killing" , "Renounce" , "Destroy" , "Give up" .)