Useful publicity label on vehicle taking MDMA round the States (12)
I believe the answer is:
advantageous
'useful' is the definition.
(thesaurus)
'publicity label on vehicle taking mdma round the states' is the wordplay.
I cannot really see how this works, but
'publicity' could be 'ad' (short for advertisement) and 'ad' is located in the answer.
'label' could be 'tag' (synonyms) and 'tag' is found in the answer.
'vehicle' could be 'van' (type of vehicle) and 'van' is found within the answer.
'mdma' could be 'e' (MDMA is ecstasy, ie 'E') and 'e' is present in the answer.
'round' could be 'o' (o is a circular letter) and 'o' is found within the answer.
'states' could be 'us' (abbreviation for the United States) and 'us' is found within the answer.
This accounts for all the letters.
This explanation may well be incorrect...
Can you help me to learn more?
(Other definitions for advantageous that I've seen before include "Useful, beneficial" , "Favourable" , "Profitable" .)