Finder of a magic lamp (7)
I believe the answer is:
aladdin
'finder of a magic lamp' is the definition.
(I've seen this before)
This is all the clue.
(Other definitions for aladdin that I've seen before include "Panto lamp owner" , "Arabian Nights character with cave" , "Common panto hero" , "Common panto title" , "Lad with a lamp" .)