Most of the old salt in Polish resort is bound to make you feel better (8)
I believe the answer is:
hospital
'bound to make you feel better' is the definition.
I can't tell whether this defines the answer.
'most of the old salt in polish resort' is the wordplay.
'most of' means to remove the last letter.
'the old salt' becomes 'tar' (I've seen this before).
'in' means one lot of letters goes inside another.
'resort' indicates anagramming the letters.
'tar' with its last letter taken away is 'ta'.
'polish' anagrammed gives 'hospil'.
'ta' put into 'hospil' is 'HOSPITAL'.
'is' acts as a link.
Can you help me to learn more?
(Other definitions for hospital that I've seen before include "Sanatorium" , "Healing institution" , "Barts, e.g." , "Treatment and care centre" , "Possibly Guy's" .)