### Clue: '70s film Taxi Driver abrasive, ultimately capturing a time (7)
### Answer: CABARET 
 ### Explanation: Definition: '70s film
A charade of CABARE, an envelope ('capturing') of 'a' in CAB ('taxi') plus RE ('drive**R** abrasiv**E**' ultimately); plus T ('time'). The surface encapsulates a quite different film.