Crossword Genius

Fix rail in high street establishment (4,3)

Ross

I believe the answer is:

nail bar

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

'high street establishment' is the definition.
I don't know anything about this answer so I can't judge whether it can be defined by this definition.

'fix rail' is the wordplay.
'fix' becomes 'nail' (I've seen this before).
'rail' becomes 'bar' (metal rail or bar).
'nail'+'bar'='NAIL BAR'

'in' is the link.

Can you help me to learn more?

(Other definitions for nail bar that I've seen before include "Manicurist's establishment" , "Manicure salon" , "Type of beauty parlour" .)

I've seen this clue in The Times.
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