Disguise Mike as King (4)

I believe the answer is:

mask

'disguise' is the definition.
(masking is a kind of disguising)

'mike as king' is the wordplay.
'mike' becomes 'm' (phonetic alphabet: alpha, bravo, charlie etc.).
'king' becomes 'k'.
'm'+'as'+'k'='MASK'

(Other definitions for mask that I've seen before include "Facial disguise" , "Camouflage" , "One to hide face" , "Face covering; disguise" , "One hiding, protecting face" .)

I've seen this clue in The Times.

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