Electricity given up - agreed? (7)
I believe the answer is:
acceded
'agreed?' is the definition.
(acceding is a kind of agreeing)
'electricity given up' is the wordplay.
'electricity' becomes 'AC' (AC is an example).
'given up' becomes 'ceded' ('cede' can be a synonym of 'give up').
'ac'+'ceded'='ACCEDED'
(Other definitions for acceded that I've seen before include "'Agreed, acquiesced (7)'" , "Assented" , "Agreed to demand" , "Consented to" , "Yielded to another's wishes" .)