Boast as play cancelled (4,3)

I believe the answer is:

show off

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'boast' is the definition.
(I've seen this before)

'play cancelled' is the wordplay.
'play' becomes 'show' (I am not sure about this - if you are sure you should believe this answer much more).
'cancelled' becomes 'off' (similar in meaning).
'show'+'off'='SHOW-OFF'

'as' acts as a link.

Can you help me to learn more?

(Other definitions for show off that I've seen before include "Attention-seeker" , "Act ostentatiously" , "Swank" , "Draw attention to" , "One who boastfully displays his abilities" .)

I've seen this clue in The Telegraph.

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