More mature about a quick drink for a fast and furious fellow (10)
I believe the answer is:
ripsnorter
'a fast and furious fellow' is the definition.
I can't judge whether this definition defines the answer.
'more mature about a quick drink' is the wordplay.
'more mature' becomes 'riper' ('ripe' can be similar in meaning to 'mature').
'about' indicates putting letters inside.
'a quick drink' becomes 'snort' (I've seen this in another clue).
'riper' enclosing 'snort' is 'RIPSNORTER'.
'for' acts as a link.
Can you help me to learn more?
(Another definition for ripsnorter that I've seen is " remarkable product".)