Ted and Rita go out to get dressed (7)
I believe the answer is:
attired
'dressed' is the definition.
(I know that dressed can be written as attired)
'ted and rita go out' is the wordplay.
'and' says to put letters next to each other.
'go out' is an anagram indicator.
'ted' put after 'rita' is 'ritated'.
'ritated' with letters rearranged gives 'ATTIRED'.
'to get' is the link.
(Other definitions for attired that I've seen before include "surrounded by duds" , "got up" , "Turned out" , "Dressed or clothed" , "Wearing clothes" .)