Journals I'd taken back to sign (7)
I believe the answer is:
diaries
'journals' is the definition.
(diary is a kind of journal)
'i'd taken back to sign' is the wordplay.
'taken back' says the letters should be written in reverse.
'to sign' becomes 'aries' (star sign**).
'id' written backwards gives 'di'.
'di'+'aries'='DIARIES'
(Other definitions for diaries that I've seen before include "Personal journals" , "Personal records of daily events" , "The Basketball _; Leonardo DiCaprio film" .)