Pronounced a little slaver 'redeemable' (7)
I believe the answer is:
averred
'pronounced' is the definition.
(thesaurus)
'a little slaver redeemable' is the wordplay.
'a little' says the answer is hidden in the clue.
'AVERRED' is hidden within 'slaver redeemable'.
(Other definitions for averred that I've seen before include "Held" , "Alleged, asserted" , "Stated, asserted" , "Asserted to be the case" , "Stated to be the case" .)