Divert with morning exercise (5)
I believe the answer is:
amuse
'divert' is the definition.
(I know that divert can be written as amuse)
'with morning exercise' is the wordplay.
'with' is a charade indicator (letters next to each other).
'morning' becomes 'am' (as in 12:00 AM).
'exercise' becomes 'use' (synonyms).
'am' next to 'use' is 'AMUSE'.
(Other definitions for amuse that I've seen before include "Enliven" , "Pleasantly occupy" , "interest" , "Beguile" , "Make (someone) laugh" .)