Concoct happy lectures? I might! (6,7)

I believe the answer is:

supply teacher

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'i might' is the definition.
I don't know anything about this answer so I cannot tell whether this works.

'concoct happy lectures?' is the wordplay.
'concoct' indicates anagramming the letters (I've seen 'concocted' mean this).
'happy'+'lectures'='happylectures'
'happylectures' anagrammed gives 'SUPPLY TEACHER'.

Can you help me to learn more?

(Other definitions for supply teacher that I've seen before include "Stopgap in school" , "Temporary educator" , "Stand-in educator" , "A short-term replacement" .)

I've seen this clue in The Independent.

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