Trepidation over the French ship on Scottish lake? Not at all! (12)

I believe the answer is:

fearlessness

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'trepidation over the french ship on scottish lake? not at all' is the definition.
I can't tell whether this definition defines the answer.

'trepidation over the french ship on scottish lake?' is the wordplay.
'trepidation' becomes 'fear' (I've seen this in another clue).
'over' is a charade indicator (letters next to each other).
'the french' becomes 'le' ('the' in French).
'ship on' becomes 'ss' (prefix in ship names eg SS Great Britain. I am not sure about the 'on' bit.).
'scottish lake?' becomes 'ness' (I've seen this in another clue).
'fear'+'le'+'ss'+'ness'='FEARLESSNESS'

Can you help me to learn more?

(Another definition for fearlessness that I've seen is " Bravery".)

I've seen this clue in The Irish Times.

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