Fashionable second course (6)
I believe the answer is:
modish
'fashionable' is the definition.
(similar in meaning)
'second course' is the wordplay.
'second' becomes 'mo' (both are short periods of time).
'course' becomes 'dish' (dish can mean a course of a meal).
'mo'+'dish'='MODISH'
(Other definitions for modish that I've seen before include "Fashionable, in style" , "In fashion or style" , "I'm shod in the current fashion" , "in the latest fashion?" , "Trendy" .)