Out of date, only taken in to be repaired (8)
I believe the answer is:
obsolete
'out of date' is the definition.
(I've seen this before)
'only taken in to be repaired' is the wordplay.
'only' becomes 'sole' (synonyms).
'taken in' means one lot of letters goes inside another.
'repaired' indicates an anagram.
'to'+'be'='tobe'
'tobe' anagrammed gives 'obte'.
'sole' put within 'obte' is 'OBSOLETE'.
(Other definitions for obsolete that I've seen before include "Obese lot may be out of date" , "Antiquated" , "Boots eel away, being out of date" , "Old hat" , "No longer current" .)