Supplied out of the safe deposit (3)
I believe the answer is:
fed
'supplied' is the definition.
(feeding is a kind of supplying)
'of the safe deposit' is the wordplay.
'of' indicates the answer is hidden within the clue.
'FED' is hidden in the letters of 'safe deposit'.
'out' acts as a link.
(Other definitions for fed that I've seen before include "supplied with power?" , "Provided food for" , "Provided courses" , "Given sustenance" , "Dished up food" .)