Is jealous of five in Seine doing backstroke? (6)
I believe the answer is:
envies
'is jealous of' is the definition.
(I've seen this in another clue)
'in seine doing backstroke?' is the wordplay.
'in' means one lot of letters goes inside another.
'doing' indicates an anagram (doing can mean solving or working out).
'backstroke?' becomes 'v' (I am not sure about this - if you are sure you should believe this answer much more).
'seine' with letters rearranged gives 'enies'.
'enies' going around 'v' is 'ENVIES'.
'five' acts as a link.
This may not be correct. It may belong to another bit of the clue.
Can you help me to learn more?
(Other definitions for envies that I've seen before include "Is even (anag.)" , "Is jealous of, begrudges" , "Covets" .)