Crown represented in a coat of arms? (5)
I believe the answer is:
Here is my best explanation:
This clue might be a double definition.
'crown represented in' is the first definition.
'crest' can be an answer for 'crown' (thesaurus). I am not sure about the 'represented in' bit.
'coat of arms?' is the second definition.
'a' is the link.
(Other definitions for crest that I've seen before include "Heraldic device representing a family", "Top of a ridge or wave", "Highest point", "Top line of a hill, mountain, or wave", "Tuft", "Ridge", "Peak - comb", "Top of a ridge/wave", "Top point of hill or wave" and "Top (of wave etc)".)