Went back to be given another session at hospital? (9)
I believe the answer is:
retreated
This clue is a double definition.
'went back' is the first definition.
('retreat' can be a synonym of 'go back')
'given another session at hospital?' is the second definition.
(given medical treatment again)
'to be' acts as a link.
(Other definitions for retreated that I've seen before include "given extra medical care?" , "pulled back" , "Retired" , "Went back" , "Withdrew from enemy forces" .)