Rearranged AGM imparts realistic approach (10)
I believe the answer is:
pragmatism
'realistic approach' is the definition.
(realistic or practical approach to things)
'rearranged agm imparts' is the wordplay.
'rearranged' indicates an anagram.
'agm'+'imparts'='agmimparts'
'agmimparts' with letters rearranged gives 'PRAGMATISM'.
(Other definitions for pragmatism that I've seen before include "philosophical approach" , "Practical approach" , "Realistic attitude" .)