Author in love with son begins show (5)

I believe the answer is:

opens

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

'begins show' is the definition.
'opens' can be an answer for 'begins' (opening is a kind of begining). I'm not certain of the 'show' bit.

I don't understand the rest of the clue.

Can you help me to learn more?

(Other definitions for opens that I've seen before include "expands" , "Takes the cover off" , "Unseals" , "Launches" , "Unlocks" .)

I've seen this clue in The Independent and The Sun.

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