One increasing volume direct from procurer (8)

I believe the answer is:

expander

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'one increasing volume direct' is the definition.
The definition suggests a singular noun which matches the answer.

'from procurer' is the wordplay.
'from' becomes 'ex' ('from' in Latin).
'procurer' becomes 'pander' (synonyms).
'ex'+'pander'='EXPANDER'

Can you help me to learn more?

(Another definition for expander that I've seen is " Muscle exerciser".)

I've seen this clue in The Telegraph.

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