Lecturer catches Heather cycling, the main cause of trouble (10)

I believe the answer is:

ringleader

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'main cause of trouble' is the definition.
I can't judge whether this defines the answer.

'lecturer catches heather cycling' is the wordplay.
'lecturer' becomes 'reader' (synonyms).
'catches' is an insertion indicator.
'heather cycling' becomes 'ingl' (I am not sure about this - if you are sure you should give a lot more credence to this answer).
'reader' going around 'ingl' is 'RINGLEADER'.

'the' acts as a link.

Can you help me to learn more?

(Other definitions for ringleader that I've seen before include "Chief troublemaker" , "One heading up illicit activity" , "Mastermind" , "Chief mischief-maker" , "firebrand" .)

I've seen this clue in The Telegraph.

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