The image a coin may show (4)
I believe the answer is:
icon
'the image' is the definition.
('icon' can be a synonym of 'image')
'a coin may show' is the wordplay.
'coin' anagrams to 'ICON'.
However, I'm not sure how the anagram is indicated.
(Other definitions for icon that I've seen before include "Painting or person regarded as sacred" , "Example of symbolism" , "Religious image or computer symbol" , "Holy painting" , "Superstar" .)