### Clue: Turn on debtor that's ready for it after bit of petting (5,2)
### Answer: POWER UP 
 ### Explanation: Definition: Turn on
 [OWER(a debtor/one who owes somebody else) + UP(ready for it, as in "are you up to it", whatever "it" is)] **placed after**(after) **1st letter of**(bit of) "petting".
Defn: … an electrical device, say, a computer.