Unnerved conductor with loud ending (7)
I believe the answer is:
rattled
'unnerved' is the definition.
(I've seen this before)
'conductor with loud ending' is the wordplay.
'conductor' becomes 'rattle' (Rattle is an orchestra conductor).
'with' says to put letters next to each other.
'ending' suggests the final letters.
The final letter of 'loud' is 'd'.
'rattle'+'d'='RATTLED'
(Other definitions for rattled that I've seen before include "Agitated or flustered by child's toy?" , "Extremely disconcerted" , "Worried, irritated" , "Disturbed or flustered -like noisy snake?" , "what pit viper did" .)