King hiding in a French shack, safe and sound (6)
I believe the answer is:
unhurt
'safe and sound' is the definition.
(I've seen this before)
'king hiding in a french shack' is the wordplay.
'king' becomes 'r' (r is abbreviation for rex).
'hiding in' is an insertion indicator.
'a french' becomes 'un' ('a' in French).
'shack' becomes 'hut' ('hut' can be a synonym of 'shack').
'un'+'hut'='unhut'
'r' inserted inside 'unhut' is 'UNHURT'.
(Other definitions for unhurt that I've seen before include "Not damaged" , "Not injured or wounded" , "Not injured or maimed" , "Safe and sound" , "Not harmed" .)