Official investigation (5)
'official investigation' is the definition.
(I've seen this before)
This is all the clue.
(Other definitions for enquiry that I've seen before include "Official investigation" , "(Act of) asking for info" .)
'official investigation' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for inquiry that I've seen before include "Formal investigation" , "Official investigation" .)
'official investigation' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for probe that I've seen before include "Intrusive device" , "Investigate closely" , "sound" , "Poke into" , "Examine searchingly" .)