Whinge from signalmen who are caught in the sea by one of those involved in a cast (6)
I believe the answer is:
salmon
'whinge from signalmen who are caught in the sea by one of those involved in a cast' is the definition.
The definition suggests a singular noun which matches the answer.
'whinge from signalmen who are caught in' is the wordplay.
'from' is a deletion indicator.
'are caught in' is an insertion indicator.
'signalmen' placed around 'who' is 'signalmewhon'.
'signalmewhon' with 'whinge' taken away is 'SALMON'.
Can you help me to learn more?
(Other definitions for salmon that I've seen before include "Food fish; pink shade" , "'No alms, oddly, for this fish (6)'" , "pink-orange in colour" , "Fish; pink colour" , "Legendary fish of knowledge" .)