Order a seer to get rid of unwanted letters (5)

I believe the answer is:

erase

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'get rid of unwanted letters' is the definition.
I can't judge whether this definition defines the answer.

'order a seer' is the wordplay.
'order' indicates an anagram.
'a'+'seer'='aseer'
'aseer' is an anagram of 'ERASE'.

'to' is the link.

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(Other definitions for erase that I've seen before include "Remove recorded material" , "score" , "Blot out" , "Kill" , "Blank out" .)

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

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