The colour will be higher on one side of the face! (6)
I believe the answer is:
cerise
'the colour' is the definition.
(cerise is a kind of colour)
'be higher on one side of the face' is the wordplay.
'be higher on one' becomes 'ceri' (I am not sure about this - if you are sure you should give a lot more credence to this answer).
'side of' suggests removing the centre (I've seen 'sides of' mean this (only the letters on the sides remain)).
'the face' becomes 'side' (synonyms).
'side' with its centre taken out is 'se'.
'ceri'+'se'='CERISE'
'will' acts as a link.
Can you help me to learn more?
(Other definitions for cerise that I've seen before include "Colour of ripe cherries" , "Deep red colour" , "Vivid reddish-pink" , "Pinkish-red" , "Light clear red" .)