Don't stop transmitting semaphore signals in jug (6)
I believe the answer is:
flagon
'jug' is the definition.
(I have seen 'Large jug ' mean 'flagon' so perhaps 'jug' could also mean 'flagon')
'don't stop transmitting semaphore signals' is the wordplay.
I cannot really understand how this works, but
'stop' could be 'go' (going is a kind of stopping) and 'go' is located in the answer.
The remaining letters 'flan' is a valid word which might be clued in a way I don't see.
This may be the basis of the clue (or it may be nonsense).
'in' is the link.
Can you help me to learn more?
(Other definitions for flagon that I've seen before include "Large wine vessel" , "Wine jug" , "Large rounded bottle, may contain cider" , "Snow White companion" , "Large vessel for beverages" .)