Short expletive heard on EastEnders - he caught her with a chopper! (10)
I believe the answer is:
helicopter
'a chopper' is the definition.
(synonyms)
'short expletive heard on eastenders he caught her' is the wordplay.
I cannot really see how this works, but
'he' could be 'eli' and 'eli' is found within the answer.
'caught' could be 'c' (cricket abbreviation) and 'c' is found in the answer.
This explanation may well be incorrect...
'with' acts as a link.
Can you help me to learn more?
(Other definitions for helicopter that I've seen before include "Triple echo (anag) - form of air transport" , "Flier" , "surveillance equipment" , "surveillance vehicle" , "This can be used to transport" .)