Crossword Genius

Keep moving front of ship on lake (5)

Ross

I believe the answer is:

prowl

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'keep moving' is the definition.
The definition and answer can be both acts as well as being singular nouns.
Perhaps you can see an association between them that I don't see?

'front of ship on lake' is the wordplay.
'front of ship' becomes 'prow' (I've seen this before).
'on' is a charade indicator (letters next to each other) (in a down clue, letters appear on others).
'lake' becomes 'L' (geographical abbreviation).
'prow'+'l'='PROWL'

Can you help me to learn more?

(Other definitions for prowl that I've seen before include "Move stealthily around" , "Restlessly roam around" , "Rove" , "Move in search of prey" , "Creep around" .)

I've seen this clue in The Telegraph.
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