Crossword Genius

Regularity of pastries perhaps getting salt (8)

Ross

I believe the answer is:

tartrate

'salt' is the definition.
(I know that tartrate is a type of salt)

I cannot understand how the remainder of the clue works.

(Other definitions for tartrate that I've seen before include "salt" , "compound?" .)

I've seen this clue in The Independent.
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