Odd character that is moved around in anagram of word (6)
I believe the answer is:
weirdo
'odd character' is the definition.
(weird person)
'that is moved around in anagram of word' is the wordplay.
'that is' becomes 'ie' (short for Latin 'id est', 'that is').
'moved around' is a reversal indicator.
'in' means one lot of letters goes inside another.
'anagram of' indicates anagramming the letters.
'ie' back-to-front is 'ei'.
'word' with letters rearranged gives 'wrdo'.
'ei' going within 'wrdo' is 'WEIRDO'.
(Other definitions for weirdo that I've seen before include "Bizarre character" , "Person who behaves bizarrely" , "Crank - oddball" , "Unpleasantly strange or eccentric person" , "Derogatory term for an eccentric" .)