Lack maturity, following drink (8)
I believe the answer is:
shortage
'lack' is the definition.
(I know that shortage is a type of lack)
'maturity following drink' is the wordplay.
'maturity' becomes 'age' (I've seen this before).
'following' means one lot of letters go next to another.
'drink' becomes 'short' ().
'age' after 'short' is 'SHORTAGE'.
(Other definitions for shortage that I've seen before include "may put price up" , "Dearth, lack" , "Horse tag (anag.)" , "Scarcity" , "Want" .)