Evict complete group to start (6)

I believe the answer is:

outset

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'start' is the definition.
(I know that start can be written as outset)

'evict complete group' is the wordplay.
'evict' becomes 'out' (I can't justify this - if you can you should believe this answer much more).
'complete group' becomes 'set' (I've seen this in another clue).
'out'+'set'='OUTSET'

'to' is the link.

Can you help me to learn more?

(Other definitions for outset that I've seen before include "Starting point" , "launch" , "Kickoff time?" , "Opening stage" , "debut?" .)

I've seen this clue in The Irish Independent.

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