Writer’s gripped by odd sound (10)
I believe the answer is:
unimpaired
'sound' is the definition.
(thesaurus)
'writer's gripped by odd' is the wordplay.
'writer's' becomes 'I'm' ('I am' referring to the writer of the clue).
'gripped by' indicates putting letters inside.
'odd' becomes 'unpaired' (synonyms).
'im' placed within 'unpaired' is 'UNIMPAIRED'.
(Other definitions for unimpaired that I've seen before include "none the worse for it?" , "Not weakened or damaged" .)