An age certain to get wiped out (7)

I believe the answer is:

erasure

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'get wiped out' is the definition.
I can't tell whether this definition defines the answer.

'an age certain' is the wordplay.
'an age' becomes 'era' (both can mean a long time).
'certain' becomes 'sure' (synonyms).
'era'+'sure'='ERASURE'

'to' acts as a link.

Can you help me to learn more?

(Other definitions for erasure that I've seen before include "Obliteration - rare use (anag)" , "Band with Andy Bell and Vince Clarke, or wipe-out" , "Rubbing out - English synthpop duo" , "Removal" , "Wiping out - English pop duo" .)

I've seen this clue in The Globe and Mail.

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