Green or Conservative given permit (6)
I believe the answer is:
callow
'green' is the definition.
(I've seen this before)
'conservative given permit' is the wordplay.
'conservative' becomes 'C' (abbreviation commonly used in UK politics).
'given' says to put letters next to each other.
'permit' becomes 'allow' (synonyms).
'c'+'allow'='CALLOW'
'or' is the link.
(Other definitions for callow that I've seen before include "Immature and inexperienced, as youth often is" , "Inexperienced or innocent" , "Young and inexperienced" , "Immature and inexperienced, like youth" , "Simon ---, actor; immature" .)