Semi-public body (6)
I believe the answer is:
quango
'semi-public body' is the definition.
(I've seen this before)
This is the entire clue.
(Other definitions for quango that I've seen before include "Semi-public body outside the Civil Service" , "Semi-public government board" , "Organisation that gets money from government but acts independently" , "Unelected admin. body" , "Government-appointed body" .)