Clue: With smells around, smell trainers? (7)
Answer: REEBOKS
Explanation: Definition: trainers
 REEKS(smells strongly and unpleasantly/stinks) **containing**(With … around) BO(abbrev. for "body odour", unpleasant sweaty body smell).
Defn: Footwear, including trainers, produced by Reebok International Limited.