That hungry man’s pub at Ponder’s End (5)
I believe the answer is:
inner
'that hungry man's' is the definition.
I can't judge whether this defines the answer.
'pub at ponder's end' is the wordplay.
'pub' becomes 'inn' (I've seen this before).
'at' means one lot of letters go next to another.
'ponder's end' becomes 'er' (I am not sure about this - if you are sure you should believe this answer much more).
'inn'+'er'='INNER'
Can you help me to learn more?
(Other definitions for inner that I've seen before include "Interior" , "Ring round the target bull." , "Relating to the soul, mind or spirit" , "Ring next to the bullseye" , "Internal - mental" .)