Crossword Genius

A Caledonian, royal on occasion (5)

Ross

I believe the answer is:

ascot

I'm a little stuck... Click here to teach me more about this clue!

'royal on occasion' is the definition.
The definition and answer can be both man-made objects as well as being singular nouns.
Perhaps you can see a link between them that I don't see?

'a caledonian' is the wordplay.
'caledonian' becomes 'scot' (I've seen this before).
'a'+'scot'='ASCOT'

Can you help me to learn more?

(Other definitions for ascot that I've seen before include "Type of necktie" , "track" , "Necktie with wide square ends" , "Royal race course" , "English town" .)

Want a hint initially instead of a full solution? Install my app