Crossword Genius

Annoyed informer finally getting to retire (3,3,2,5)

Ross

I believe the answer is:

put out to grass

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

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

'annoyed informer finally getting to' is the wordplay.
I cannot quite see how this works, but
'annoyed' could be 'putout' (I've seen this before) and 'putout' is found within the answer.
'informer' could be 'grass' (I've seen this before) and 'grass' is found in the answer.
'to' is within the answer.
No letters remain.
This may be the basis of clue (or it may be nonsense).

Can you help me to learn more?

(Other definitions for put out to grass that I've seen before include "retire" , "Treated as past it" , "offer nark sexual favours" , "Pensioned off" .)

I've seen this clue in the Irish Times and the Irish Times (Crosaire).
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