4 across
Our
secret
repository
tapes
got
interfered
with
(8)
Our secret repository tapes got interfered with (8)
hints
0
checks
0
hints
The definition is at the beginning of the clue.
How the clue works
The definition is Our secret repository — think of the phrase "between you, me and the gatepost," meaning something said in confidence. Then tapes got has been interfered with, which is your anagram indicator, and sure enough the letters of "tapes got" jumble up to give you GATEPOST.