One intoxicated by a letter in red ink, perhaps? (7)
I believe the answer is:
drinker
'one intoxicated' is the definition.
I can't judge whether this definition defines the answer.
'a letter in red ink perhaps?' is the wordplay.
'a letter' becomes 'r' ().
'in' indicates putting letters inside.
'perhaps?' is an anagram indicator (I've seen 'perhaps' mean this).
'red'+'ink'='redink'
'redink' anagrammed gives 'dinker'.
'r' inserted inside 'dinker' is 'DRINKER'.
'by' acts as a link.
Can you help me to learn more?
(Other definitions for drinker that I've seen before include "Inebriate" , "Tippler" , "Imbiber, toper" , "Consumer of liquid, probably alcohol" .)