Instal last of the cheap pinot blend (7)

I believe the answer is:

appoint

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'instal last of the cheap pinot blend' is the definition.
I can't tell whether this definition defines the answer.

'instal last of the cheap pinot blend' is the wordplay.
'instal' becomes 'a' (I am not sure about this - if you are sure you should give a lot more credence to this answer).
'last of' indicates one should take the final letters.
'blend' indicates anagramming the letters (I've seen 'blended' mean this).
The last letter of 'cheap' is 'p'.
'pinot' is an anagram of 'point'.
'a'+'p'+'point'='APPOINT'

Can you help me to learn more?

(Other definitions for appoint that I've seen before include "Assign job to (someone)" , "Give job to" , "Pick" , "Assign to a post" , "Ordain" .)

I've seen this clue in the Sydney Morning Herald.

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