### Clue: US farmer, potential buyer, welcomes article about credit (12)
### Answer: SHARECROPPER 
 ### Explanation: Definition: US farmer
  SHOPPER(potential buyer wandering the shops) **containing**(welcomes) [A(article in grammar) + RE(short for regarding,about) + CR(abbrev. for "credit", especially used by bean-counters)] 
Answer: In the US, a farmer, especially a tenant who pays a part,share of the crop as rent.