Impression blurry in green light (10)
I believe the answer is:
'green light' is the definition.
(I've seen this before)
'impression blurry' is the wordplay.
'impression' anagrams to 'PERMISSION'.
Though, I am unsure how the anagram is indicated.
'in' is the link.
Can you help me to learn more?
(Other definitions for permission that I've seen before include "Leave" , "Consent, authorisation" , "Visa, eg" , "Allowance" , "Green light" .)