Rolling reefer or downing drop of red? Perfect! (5-4)
I believe the answer is:
error-free
'perfect' is the definition.
(I've seen this in another clue)
'rolling reefer or downing drop of red?' is the wordplay.
I cannot quite see how this works, but
'or' is within the answer.
'red?' could be 'r' (I've seen this in other clues) and 'r' is present in the answer.
an anagram of 'reefer' is 'erfree' which is within the remaining letters.
This accounts for all the letters.
This explanation may well be incorrect...
Can you help me to learn more?
(Other definitions for error-free that I've seen before include "Faultless" , "Without mistakes" .)