Trade disrupted? Put your foot down! (5)
I believe the answer is:
tread
'foot down' is the definition.
'tread' can be an answer for 'foot' (treading is a kind of footing). I'm not certain of the 'down' bit.
'trade disrupted? put your' is the wordplay.
'trade' can be anagrammed to 'TREAD'.
But, I am not sure how the anagram is indicated.
Can you help me to learn more?
(Other definitions for tread that I've seen before include "A measurement of tyre" , "pace" , "Sole of a shoe" , "Grooved surface of a tyre" , "Part of sole" .)