### Clue: Supporting position of legal hooker? (6)
### Answer: ONSIDE 
 ### Explanation: Definition: position of legal hooker
 [ON SIDE](on someone's side;supporting someone).
Defn: In other words, in rugby rules, a position where the hooker can stand in a lineout without being offside, the latter forbidding him from interfering with play. Definitely not the position of a sex worker, legal or not.