Throttle fish and otter right away (7)
I believe the answer is:
garotte
'throttle' is the definition.
(garotting is a kind of throttling)
'fish and otter right away' is the wordplay.
'fish' becomes 'gar' (type of gar).
'and' is a charade indicator (letters next to each other).
'right' becomes 'r' (common abbreviation).
'away' suggests deleting specific letters.
'otter' with 'r' taken out is 'otte'.
'gar'+'otte'='GAROTTE'
(Other definitions for garotte that I've seen before include "throttle" , "Strangle" , "Facility to dispose of person" , "Kill by strangulation" , "Spanish method of execution" .)