Royal attendant John having suntan (5)

I believe the answer is:

brown

I believe this is a double definition.

'royal attendant john' is the first definition.
(John Brown, servant of Queen Victoria)

'having suntan?' is the second definition.

(Other definitions for brown that I've seen before include "Colour of toast" , "Colour (at No 11?)" , "Shade" , "Kind of sweetener" , "Mixture of red, yellow and blue" .)

I've seen this clue in The Times and The Sun.

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