Legalise turning trimmings into fodder (6)

I believe the answer is:

silage

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'fodder' is the definition.
(fodder used to feed animals)

'legalise turning trimmings' is the wordplay.
'SILAGE' is hidden back-to-front within the letters.
However, I'm not sure how the hidden word is indicated.

'into' is the link.

Can you help me to learn more?

(Other definitions for silage that I've seen before include "Preserved fodder for cattle" , "Fodder in store" , "Fermented feeding stuff for cattle" , "Stored, dried animal fodder" , "Animal foodstuff" .)

I've seen this clue in the Sydney Morning Herald.

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