Taxi turns up, attending to company that's rolled up (7)
I believe the answer is:
tobacco
'that's rolled up' is the definition.
I can't judge whether this defines the answer.
'taxi turns up attending to company' is the wordplay.
'taxi' becomes 'cab' (synonyms).
'turns up' says the letters should be written backwards.
'attending' means one lot of letters go next to another (to attend can mean to follow).
'company' becomes 'co' (abbreviation).
'cab' back-to-front is 'bac'.
'bac' put after 'to' is 'tobac'.
'tobac'+'co'='TOBACCO'
Can you help me to learn more?
(Other definitions for tobacco that I've seen before include "Leaves that are smoked" , "Dried leaves for smoking" , "Narcotic leaf plant" , "Smoked narcotic plant" , "Smoker's leaves" .)