Mark runs animal food stores (6)
I believe the answer is:
streak
'mark' is the definition.
(I've seen this before)
'runs animal food stores' is the wordplay.
'runs' becomes 'r' (cricket abbreviation).
'animal food' becomes 'steak' (type of animal product used as food).
'stores' indicates putting letters inside.
'r' placed inside 'steak' is 'STREAK'.
(Other definitions for streak that I've seen before include "Unbroken series of events" , "run out of gear" , "act that may offend some spectators?" , "irregular line of colour" , "Long mark, run swiftly" .)