Odd way to treat anger (7)
I believe the answer is:
strange
'odd' is the definition.
(I've seen this before)
'way to treat anger' is the wordplay.
'way' becomes 'st' (abbreviation for street).
'to treat' is an anagram indicator.
'anger' with letters rearranged gives 'range'.
'st'+'range'='STRANGE'
(Other definitions for strange that I've seen before include "Funny" , "Extraordinary" , "Odd kind of garnets" , "Foreign" , "Unusual, odd" .)