Painter in boys’ home tangled with urchins (10,5)
I believe the answer is:
hieronymus bosch
'painter' is the definition.
(I have seen 'Dutch painter' mean 'hieronymus bosch' so perhaps 'painter' could also mean 'hieronymus bosch')
'boys' home tangled with urchins' is the wordplay.
'tangled with' indicates anagramming the letters.
'boys'+'home'='boyshome'
'boyshome' with its letters mixed up with 'urchins' makes 'HIERONYMUS BOSCH'.
'in' acts as a link.
(Other definitions for hieronymus bosch that I've seen before include "He painted" , "Dutch painter" .)