Scotsman not excited about University (5)

I believe the answer is:

calum

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'scotsman' is the definition.
(I've seen this before)

'not excited about university' is the wordplay.
'not excited' becomes 'calm' (I can't explain this - if you can you should believe this answer much more).
'about' means one lot of letters goes inside another.
'university' becomes 'u' (abbreviation for university).
'calm' enclosing 'u' is 'CALUM'.

Can you help me to learn more?

(Other definitions for calum that I've seen before include "Irishman" , "Scotsman" .)

I've seen this clue in The Independent.

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