Playing with proper organ, Henry produces some blue material (12)

'some blue material' is the definition.
Although both the answer and definition are singular nouns, I can't see how one could define the other.

'playing with proper organ henry' is the wordplay.
'playing' indicates anagramming the letters.
'with' means one lot of letters go next to another.
'henry' becomes 'H' (symbol for the unit of electrical inductance).
'proper'+'organ'='properorgan'
'properorgan'+'h' is 'properorganh'.
'properorganh' is an anagram of 'PORNOGRAPHER'.

'produces' is the link.

Can you help me to learn more?