Crossword Genius

Treat in new fertiliser (7)

Ross

I believe the answer is:

nitrate

'fertiliser' is the definition.
(I've seen this before)

'treat in new' is the wordplay.
'new' indicates an anagram.
'treat'+'in'='treatin'
'treatin' with letters rearranged gives 'NITRATE'.

(Other definitions for nitrate that I've seen before include "Fertilizer" , "Tear tin up for fertiliser" , "salt" , "Nattier (anag.)" , "Fertiliser chemical" .)

I've seen this clue in The Mirror.
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