### Clue: Director's left with instructor about to quit (5)
### Answer: LOACH 
 ### Explanation: Definition: Director

**L** (left) *with* (c)**OACH** ("instructor" with C (circa, so about) *quitting*)
 
*Refers to Ken Loach, English director of films such as I*, Daniel Blake*, *My Name is Joe* and *Kes*.