On which you'd log who arses about (8)

I believe the answer is:

sawhorse

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'on which you'd log' is the definition.
I can't judge whether this defines the answer.

'who arses about' is the wordplay.
'about' is an anagram indicator.
'who'+'arses'='whoarses'
'whoarses' is an anagram of 'SAWHORSE'.

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(Other definitions for sawhorse that I've seen before include "Rack" , "Mobile carpentry station" , "stand for cutting" , "cutting support" , "support for chippy" .)

I've seen this clue in The Guardian.

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