Time to leave local green (5)
I believe the answer is:
naive
'green' is the definition.
('naive' can be similar in meaning to 'green')
'time to leave local' is the wordplay.
'time' becomes 't'.
'to leave' suggests deleting specific letters.
'local' becomes 'native' ('native' can be similar in meaning to 'local').
'native' with 't' removed is 'NAIVE'.
(Other definitions for naive that I've seen before include "Without worldly wisdom" , "Simple in outlook" , "Lacking judgment" , "Innocently trustful" , "Ingenous, easy to gull" .)