She upsets Roland endlessly (5)
I believe the answer is:
lorna
'she' is the definition.
'upsets roland endlessly' is the wordplay.
'upsets' is an anagram indicator.
'endlessly' means to remove the last letter.
'roland' with its final letter removed is 'rolan'.
'rolan' anagrammed gives 'LORNA'.
(Other definitions for lorna that I've seen before include "girl" , "-- Doone (book)" , "-- Doone, novel" , "and 21 Down: Novel by R.D. Blackmore" , "Female" .)