Crossword Genius

Something clearly colourful an evangelist's concocted (8,5)

Ross

I believe the answer is:

venetian glass

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'something clearly colourful' is the definition.
I can't tell whether this definition defines the answer.

'an evangelist's concocted' is the wordplay.
'concocted' indicates anagramming the letters.
'an'+'evangelists'='anevangelists'
'anevangelists' is an anagram of 'VENETIAN GLASS'.

Can you help me to learn more?

(Another definition for venetian glass that I've seen is " Decorative ware from Murano, Italy".)

I've seen this clue in The Times.
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