When Beth failed Biotechnology, Harry took Representational Analysis (9)

I believe the answer is:

iconology

I'm a little stuck... Click here to teach me more about this clue!

'representational analysis' is the definition.
The definition suggests a singular noun which matches the answer.

'when beth failed biotechnology harry took' is the wordplay.
I cannot quite understand how this works, but
'when' could be 'on' (I've seen this in other clues) and 'on' is present in the answer.
This explanation may well be incorrect...

Can you help me to learn more?

(Another definition for iconology that I've seen is " Study of religious art".)

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

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