Ale? No, grub cooked in this part of the pub (6,3)
I believe the answer is:
lounge bar
'this part of the pub' is the definition.
I know nothing about this answer so I cannot judge whether it can be defined by this definition.
'ale? no grub cooked' is the wordplay.
'cooked' indicates an anagram (letters cooked into a new form).
'ale'+'no'+'grub'='alenogrub'
'alenogrub' with letters rearranged gives 'LOUNGE-BAR'.
'in' acts as a link.
Can you help me to learn more?
(Other definitions for lounge bar that I've seen before include "part of hotel, perhaps" , "saloon" , "drinking-hole" , "Where one may have stout" .)