Daft (5)
'daft' is the definition.
(I've seen this before)
This is all the clue.
(Other definitions for silly that I've seen before include "Goose" , "Daft" , "Ridiculous, frivolous" , "Ludicrous, foolish" , "Stupid" .)
(Other definitions for unwise that I've seen before include "Not sensible or prudent" , "Injudicious" , "Lacking sound judgement, maybe foolish" , "Ill-judged" , "Not sensible, foolish" .)
'daft' is the definition.
(I know that daft can be written as bonkers)
This is the entire clue.
(Other definitions for bonkers that I've seen before include "Barmy, crackers" , "Slang for crazy, off the wall" , "Completely mad" , "They could reproduce" , "Cuckoo" .)