Leafy and airy signal to go (5,5)
I believe the answer is:
green light
'go' is the definition.
(I've seen this before)
'leafy and airy signal' is the wordplay.
I cannot quite see how this works, but
'and' could be 'n' (common abbreviation for 'and') and 'n' is present in the answer.
'airy' could be 'light' (synonyms) and 'light' is located in the answer.
The remaining letters 'gree' is a valid word which might be clued in a way I don't see.
This explanation may well be incorrect...
'to' acts as a link.
Can you help me to learn more?
(Other definitions for green light that I've seen before include "Go-ahead" , "Signal for go" , "Given permission to proceed" , "Seal of approval" , "Signal of consent" .)