Reverse support and copy information file (6)
I believe the answer is:
backup
This clue is a quadruple definition!!
'reverse' is the first definition.
(thesaurus)
'support' is the second definition.
(thesaurus)
'and' is a link.
'copy information' is the third definition.
'backup' can be an answer for 'copy' (thesaurus). I am not sure about the 'information' bit.
'file' is the fourth definition.
(backup file is a kind of file)
Can you help me to learn more?
(Another definition for backup that I've seen is " Reserve".)