Whatever happens with whichever patient (2,3,4)
I believe the answer is:
in any case
'whatever happens' is the definition.
(I've seen this before)
'whichever patient' is the wordplay.
I cannot quite understand how this works, but
'whichever' could be 'any' (I've seen this before) and 'any' is found within the answer.
'patient' could be 'case' (synonyms) and 'case' is found within the answer.
The remaining letters 'in' is a valid word which might be clued in a way I don't see.
This explanation may well be incorrect...
'with' is the link.
Can you help me to learn more?
(Other definitions for in any case that I've seen before include "Where a customs officer may search" , "Whatever the facts are, one way or the other" , "Where customs officers may search" , "No matter what" , "Lawyers may be so employed" .)