Crossword Genius

Allow half-hearted duelling at sea (7)


I believe the answer is:


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'allow' is the definition.
The answer and definition can be both to do with social activities as well as being verbs in their base form.
Maybe there's a link between them I don't understand?

'half-hearted duelling at sea' is the wordplay.
I cannot really understand how this works, but
'at' could be 'in' (synonymous in some cases - eg at school, in school) and 'in' is found within the answer.
This explanation may well be incorrect...

Can you help me to learn more?

(Other definitions for indulge that I've seen before include "Satisfy (an interest)" , "Gratify, spoil" , "Allow (someone) to enjoy a pleasure" , "Pamper, spoil" , "Pander to" .)

I've seen this clue in The Guardian.
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