Crossword Genius

In Scotland, it has its regional side (3)

Ross

I believe the answer is:

tay

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

'regional side' is the definition.
The answer and definition can be both related to communication as well as being singular nouns.
Maybe there's an association between them I don't understand?

'in scotland it has its' is the wordplay.
I cannot quite understand how this works, but
'it' could be 't' (abbreviation. e.g. in 'tis) and 't' is found in the answer.
The remaining letters 'ay' is a valid word which might be clued in a way I don't understand.
This explanation may well be incorrect...

Can you help me to learn more?

(Other definitions for tay that I've seen before include "Scottish river and firth" , "The - Bridge Disaster (McGonagall)" , "Scottish river in Katayama?" , "Longest river of Scotland" , "Scotland's longest river" .)

I've seen this clue in the Evening Standard.
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