Contort the face (7)
I believe the answer is:
grimace
'contort the face' is the definition.
(I've seen this before)
This is the entire clue.
(Other definitions for grimace that I've seen before include "Wry look" , "Facial contortion expressive of pain or disgust" , "Contortion of face expressing pain" , "Smirk" , "Distorted facial expression" .)