Keep going for a beer with some of the ladies (4,3)
I believe the answer is:
last out
'keep going' is the definition.
(I've seen this before)
'a beer with some of the ladies' is the wordplay.
'beer' becomes 'stout' (type of beer).
'with' is a charade indicator (letters next to each other).
'some of' says to take the initial letters (I've seen 'some' mean this).
The first letter of 'ladies' is 'l'.
'a'+'stout'='astout'
'astout' put after 'l' is 'LAST OUT'.
'for' is the link.
(Other definitions for last out that I've seen before include "when all the others have gone" , "one leaving after everyone else" , "Manage to survive" , "Keep on going" , "Survive for as long as is required" .)