A row about boy appearing in pantomime (7)
I believe the answer is:
aladdin
'pantomime' is the definition.
(I've seen this before)
'a row about boy' is the wordplay.
'row' becomes 'din' (both can mean a loud disturbance).
'about' is a charade indicator (letters next to each other).
'boy' becomes 'lad' (lad is a kind of boy**).
'din' put after 'lad' is 'laddin'.
'a'+'laddin'='ALADDIN'
'appearing in' acts as a link.
(Other definitions for aladdin that I've seen before include "A 13 Down" , "In the Arabian Nights, he acquires a magic lamp" , "Widow Twankey's principal boy" , "Lamp-rubbing poor boy" , "Magic lamp rubber?" .)