It's tossed about, about bowled over (5)

I believe the answer is:

caber

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'it's tossed' is the definition.
(as in the athletic event tossing the caber)

'about bowled over' is the wordplay.
'about' becomes 'ca' (abbreviation for 'circa').
'bowled over' becomes 'ber' (I can't justify this - if you can you should believe this answer much more).
'ca'+'ber'='CABER'

'about' acts as a link.

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(Other definitions for caber that I've seen before include "Tree trunk tossed in sport" , "Pole thrown" , "requirement for Highland fling?" , "Trimmed tree trunk tossed at Highland Games" , "that's elevated at 8 [HIGHLAND GAMES]" .)

I've seen this clue in The Telegraph.

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