Author in love with son begins show (5)
I believe the answer is:
opens
'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" .)