Seek net profit, presumably (5)
I believe the answer is:
trawl
'seek' is the definition.
Although both the answer and definition are verbs in their base form, I cannot understand how they can define each other.
I cannot understand how the rest of the clue works.
Can you help me to learn more?
(Other definitions for trawl that I've seen before include "Search thoroughly" , "Drag nets" , "Drag a large net" , "Catch" , "search for information" .)