English explorer not entirely fair about booze (7)
I believe the answer is:
raleigh
'english explorer' is the definition.
(Sir Walter Raleigh)
'not entirely fair about booze' is the wordplay.
'not entirely' means to remove the last letter.
'fair' becomes 'right'.
'about' indicates putting letters inside.
'booze' becomes 'ale' (I've seen this before).
'right' with its last letter removed is 'righ'.
'righ' enclosing 'ale' is 'RALEIGH'.
(Other definitions for raleigh that I've seen before include "old naval hero" , "Sir Walter, favourite of Elizabeth I" , "Elizabethan sea-dog" , "Elizabethan explorer" , "English explorer" .)