Defensive structure hawk circles at a distance endlessly (3,4)
I believe the answer is:
sea wall
'defensive structure' is the definition.
Both the answer and definition are singular nouns.
Maybe there's a link between them I don't understand?
'hawk circles at a distance endlessly' is the wordplay.
'hawk' becomes 'sell' (hawk can mean to sell or trade).
'circles' means one lot of letters goes inside another.
'at a distance' becomes 'away' (I've seen this before).
'endlessly' means to remove the last letter.
'away' with its last letter removed is 'awa'.
'sell' placed around 'awa' is 'SEA-WALL'.
Can you help me to learn more?
(Other definitions for sea wall that I've seen before include "Coastal construction" , "Coastal flood protection" , "Coastal defence" , "Coastal barrier" , "Embankment serving as a breakwater" .)