Playwright ran hostel in resort (9)
I believe the answer is:
rosenthal
'playwright' is the definition.
(I've seen this before)
'ran hostel in resort' is the wordplay.
'in resort' is an anagram indicator (letters get re-sorted).
'ran'+'hostel'='ranhostel'
'ranhostel' with letters rearranged gives 'ROSENTHAL'.
(Other definitions for rosenthal that I've seen before include "dramatist" , "Playwright" .)