Mollusc spurning new trip at sea (4)
I believe the answer is:
sail
'trip at sea' is the definition.
The answer and definition can be both acts as well as being singular nouns.
Maybe there's a link between them I don't understand?
'mollusc spurning new' is the wordplay.
'mollusc' becomes 'snail' (snail is a kind of mollusc).
'spurning' suggests deleting specific letters.
'new' becomes 'n' (common abbreviation eg NT for New Testament).
'snail' with 'n' taken out is 'SAIL'.
Can you help me to learn more?
(Other definitions for sail that I've seen before include "Leave shore" , "Begin a voyage" , "Travel by ship" , "Fabric on a mast" , "Leave harbour" .)