Chieftains missed Fiesta - if you've your face in your hands, you'll feel this (4)
I believe the answer is:
chin
'chieftains missed fiesta if you've your face in your hands you'll feel this' is the definition.
The definition suggests a singular noun which matches the answer.
'in your hands you'll feel this' is the wordplay.
I cannot quite see how this works, but
'in' is found in the answer.
The remaining letters 'ch' is a valid word which might be clued in a way I don't see.
This explanation may well be incorrect...
Can you help me to learn more?
(Other definitions for chin that I've seen before include "Front of lower jaw" , "Prominent feature" , "Feature of face" , "Punch to the face" , "Jutting part of lower jaw" .)