Clue: "The ___ doing for a bob", said the old scout, a stickler for rules (9)
Answer: JOBSWORTH
Explanation: "The ___ doing for a bob", said the old scout, a stickler for rules (9)
As in "the **JOB'S WORTH **doing for a bob", which a scout may have said during "bob-a-job week" back in the day when a shilling was worth something.