An explorer made nuns wander (8)
I believe the answer is:
amundsen
'an explorer' is the definition.
(I know that Amundsen is a explorer)
'made nuns wander' is the wordplay.
'wander' is an anagram indicator.
'made'+'nuns'='madenuns'
'madenuns' anagrammed gives 'AMUNDSEN'.
(Other definitions for amundsen that I've seen before include "6 24 113 [SCAN-DIN-AVIAN] explorer" , "Norwegian polar explorer, d. 1928" , "First man to reach South Pole" , "Roald -, Norwegian polar explorer" , "Roald --, first to reach the South Pole" .)