Crossword Genius

Is exact in detailing changes to set dish (4,3,2)

Ross

I believe the answer is:

dots the is

'is exact in detailing' is the definition.
(as in 'dotting the I's and crossing the T's')

'changes to set dish' is the wordplay.
'changes' indicates an anagram.
'to'+'set'+'dish'='tosetdish'
'tosetdish' with letters rearranged gives 'DOTS THE IS'.

(Another definition for dots the is that I've seen is " Ensures that all details are correct (well, half!)".)

I've seen this clue in The Guardian.
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