Course of spicy food unfinished on ICU by smoker (10)
I believe the answer is:
curriculum
'course' is the definition.
(thesaurus)
'spicy food unfinished on icu by smoker' is the wordplay.
'spicy food' becomes 'curry'.
'unfinished' means to remove the last letter.
'on' says to put letters next to each other.
'by' says to put letters next to each other.
'smoker' becomes 'lum' (I have seen 'Scottish smoker' mean 'lum' so perhaps 'smoker' could also mean 'lum').
'curry' with its last letter taken off is 'curr'.
'curr'+'icu'+'lum'='CURRICULUM'
'of' acts as a link.
(Other definitions for curriculum that I've seen before include "Course of academic studies" , "Subjects of a study course" .)