Deliver a strangled curse, being at a loose end (6)
I believe the answer is:
rescue
'deliver' is the definition.
(synonyms)
'a strangled curse being at a loose end' is the wordplay.
I cannot really understand how this works, but
an anagram of 'curse' is 'rescu' which is located in the answer.
A single letter 'e' remains which might be clued in a way I don't understand.
This explanation may well be incorrect...
Can you help me to learn more?
(Other definitions for rescue that I've seen before include "Save - deliver" , "gets one out of a tight corner" , "Free from danger or captivity" , "Pull from danger" , "Save from danger or distress" .)