Aroma around poles inside of tent is rubbish (8)
I believe the answer is:
nonsense
'is rubbish' is the definition.
(I've seen this before)
'aroma around poles inside of tent' is the wordplay.
'aroma' becomes 'nose' (I've seen this before).
'around' means one lot of letters goes inside another.
'poles' becomes 'ns' (North and South poles).
'inside of' says to take the centre.
The central letters of 'tent' are 'en'.
'ns'+'en'='nsen'
'nose' going around 'nsen' is 'NONSENSE'.
(Other definitions for nonsense that I've seen before include "Foolish behaviour" , "Fiddle-faddle" , "Words or ideas that don't make sense" , "Bilge, drivel" , "Claptrap, hogwash" .)