Daily Times cryptic used in treatment of OCD (8)
I believe the answer is:
domestic
'daily' is the definition.
(I've seen this before)
'times cryptic used in treatment of ocd' is the wordplay.
'cryptic' is an anagram indicator (a cryptic or obscure order of the letters).
'used in' means one lot of letters goes inside another.
'treatment of' is an anagram indicator (letters treated or processed).
'times' anagrammed gives 'mesti'.
'ocd' is an anagram of 'doc'.
'mesti' put into 'doc' is 'DOMESTIC'.
(Other definitions for domestic that I've seen before include "Family quarrel" , "Concerning internal affairs" , "Tame - row - maid" , "row between couple at home" , "Relating to home or private affairs" .)