Steal grass? (6)

I believe the answer is:

snitch

I believe this clue is a double definition.

'steal' is the first definition.
('snitch' can be a synonym of 'steal')

'grass?' is the second definition.
(thesaurus)

(Other definitions for snitch that I've seen before include "Grass" , "Whistleblower (informal)" , "who tells on his classsmate?" , "I'm telling!" , "Inform on someone in slangy way" .)

I've seen this clue in The Telegraph.

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