Perhaps camping on loch takes determined focus (10)

I believe the answer is:

intentness

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'determined focus' is the definition.
The answer and definition can be both human attributes as well as being singular nouns.
Perhaps you can see a link between them that I don't see?

'perhaps camping on loch' is the wordplay.
'perhaps' becomes 'in' (I can't justify this - if you can you should believe this answer much more).
'camping' becomes 'tent' (I've seen this in other clues).
'on' says to put letters next to each other (in a down clue, letters appear on others).
'loch' becomes 'ness' (Loch Ness in Scotland).
'in'+'tent'+'ness'='INTENTNESS'

'takes' acts as a link.

Can you help me to learn more?

I've seen this clue in The Sunday Times and The Times.

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