Course prepared by woman with second husband (4)
I believe the answer is:
dish
'course' is the definition.
(I know that course can be written as dish)
'woman with second husband' is the wordplay.
'woman' becomes 'di' (short for Diana).
'with' says to put letters next to each other.
'second' becomes 's' (common abbreviation).
'husband' becomes 'h'.
'di'+'s'+'h'='DISH'
'prepared by' acts as a link.
(Other definitions for dish that I've seen before include "Menu item - plate" , "Ruin" , "Container for serving food" , "One who's fetching" , "(Food for) serving plate" .)