Colour displayed by part of acer is exquisite (6)
I believe the answer is:
cerise
'colour' is the definition.
(cerise is a kind of colour)
'part of acer is exquisite' is the wordplay.
'part of' indicates the answer is hidden within the clue.
'CERISE' can be found hidden inside 'acer is exquisite'.
'displayed by' acts as a link.
(Other definitions for cerise that I've seen before include "Light clear red" , "Bright cherry-red colour" , "Color of ripe cherries" , "Light purplish red" , "Cherry red colour" .)