Zero to interest me about trade ban (7)
I believe the answer is:
embargo
'trade ban' is the definition.
(I've seen this before)
'zero to interest me about' is the wordplay.
'zero' becomes 'o'.
'to interest' becomes 'grab' (I've seen this before).
'about' is a reversal indicator.
'o'+'grab'+'me'='ograbme'
'ograbme' in reverse letter order is 'EMBARGO'.
(Other definitions for embargo that I've seen before include "Boycott" , "Government trade ban" , "Restraint - prohibition" , "Stop" , "Order intended to prevent trade" .)