Wears a mask, as it avoids embarrassment (5,3'1,4) (5,4,4)

'avoids embarrassment 53'14' is the definition.
I know nothing about this answer so I can't judge whether it can be defined by this definition.

'wears a mask as it' is the wordplay.
I cannot quite see how this works, but
'a' could be 'one' and 'one' is found within the answer.
'mask' could be 'face' (face mask is a kind of mask) and 'face' is present in the answer.
'it' could be 'sa' (old-fashioned abbreviation for sex appeal) and 'sa' is found within the answer.
This may be the basis of clue (or it may be nonsense).

Can you help me to learn more?