Start getting dismissed by group (6)
I believe the answer is:
outset
'start' is the definition.
(I know that start can be written as outset)
'dismissed by group' is the wordplay.
'dismissed' becomes 'out' (dismissed in cricket).
'by' says to put letters next to each other.
'group' becomes 'set' (both can mean a collection).
'out'+'set'='OUTSET'
'getting' acts as a link.
(Other definitions for outset that I've seen before include "Inception" , "Set out in the beginning" , "Beginning, start" , "Kickoff time?" , "Starting point" .)