Grand odds concerning a wanderer (8)

I believe the answer is:

gadabout

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'a wanderer' is the definition.
(thesaurus)

'grand odds concerning' is the wordplay.
'grand odds' becomes 'gad' (I can't justify this - if you can you should believe this answer much more).
'concerning' becomes 'about' (about can mean concerning or relating to).
'gad'+'about'='GADABOUT'

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(Other definitions for gadabout that I've seen before include "Restless seeker after amusement" , "Rover" , "Pleasure-seeker" , "Person who wanders aimlessly in search of pleasure" , "Vagrant" .)

I've seen this clue in the Sydney Morning Herald.

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