Male attending annual Royal occasion displays charm (6)
I believe the answer is:
mascot
'charm' is the definition.
(I've seen this before)
'male attending annual royal occasion' is the wordplay.
'male' becomes 'm' (common abbreviation).
'attending' is a charade indicator (letters next to each other).
'annual royal occasion' becomes 'ascot' (English racecourse which hosts The Royal Meeting).
'm'+'ascot'='MASCOT'
'displays' acts as a link.
(Other definitions for mascot that I've seen before include "World Cup Willie, say" , "Bringer of good luck to team, etc" , "Luck-bringer" , "Character or object used to bring good luck, or represent an organisation" , "One for good luck" .)