Put under the sea instead, after a redesign (13)
I believe the answer is:
anaesthetised
'put under' is the definition.
(put under anaesthetic)
'the sea instead after a redesign' is the wordplay.
'after' is a charade indicator (letters next to each other).
'a redesign' indicates an anagram (I've seen this in other clues).
'the'+'sea'+'instead'='theseainstead'
'theseainstead' is an anagram of 'ANAESTHETISED'.
(Other definitions for anaesthetised that I've seen before include "Put out" , "Caused to feel no pain" .)