### Clue: Works jammed with poles, which might need extracting (7)
### Answer: TONSILS 
 ### Explanation: Definition: which might need extracting 
 TOILS(works hard) **containing**(jammed with) N,S(abbrev. for "north" and "south", respectively, the 2 geographic poles).
Defn: Masses of tissue in the human throat which might need surgical removal;extraction in some cases.