After returning, rarely bored by university course sections (7)

'after returning rarely bored by university course sections' is the definition.
I can't judge whether this definition defines the answer.

'after returning rarely bored by university' is the wordplay.
'after returning' shows that the letters should be reversed in order.
'rarely' becomes 'seldom' (synonyms).
'bored by' means one lot of letters goes inside another (to bore something can mean to drill into it).
'university' becomes 'U' (abbreviation as in UMass).
'seldom' placed around 'u' is 'seludom'.
'seludom' backwards is 'MODULES'.

Can you help me to learn more?