Popular with nurse, so propose! (6)
I believe the answer is:
intend
'propose' is the definition.
(thesaurus)
'popular with nurse' is the wordplay.
'popular' becomes 'in'.
'with' is a charade indicator (letters next to each other).
'nurse' becomes 'tend' (I've seen this before).
'in'+'tend'='INTEND'
'so' is the link.
(Other definitions for intend that I've seen before include "Have as purpose or resolve" , "Have as purpose or in mind" , "Contemplate - mean - plan" , "Signify" , "Mean (to do something)" .)