Headgear bloke put on head of equerry, gold (7)
I believe the answer is:
chapeau
'headgear' is the definition.
(I know that chapeau is a type of headgear)
'bloke put on head of equerry gold' is the wordplay.
'bloke' becomes 'chap' (both can mean a man).
'put on' means one lot of letters go next to another.
'head of' says to take the initial letters.
'gold' becomes 'Au' (Au is the chemical symbol for gold).
The initial letter of 'equerry' is 'e'.
'chap'+'e'+'au'='CHAPEAU'
(Other definitions for chapeau that I've seen before include "something to put on noodles" , "(French) hat" , "Fashionable hat" , "Cap (French or heraldic?)" .)