A small adaptation by the Ministry (3)
I believe the answer is:
mod
'ministry' is the definition.
(Ministry of Defence)
I don't understand the remainder of the clue.
Can you help me to learn more?
(Other definitions for mod that I've seen before include "Gaelic literary festival" , "1960s teenager" , "ministry" , "Meeting of the Scottish" , "Rocker's rival?" .)