Once more employ new green generation (2-6)

I believe the answer is:

re-engage

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

'new green generation' is the definition.
The definition suggests a singular noun which matches the answer.

'once more employ' is the wordplay.
'once more' becomes 're' (prefix in words like 're-emerge' or 're-enter').
'employ' becomes 'engage' (synonyms).
're'+'engage'='RE-ENGAGE'

Can you help me to learn more?

(Other definitions for re-engage that I've seen before include "Get back on job" , "Employ or hire again" .)

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

Want a hint initially instead of a full solution? Install my app