Riddle is upsetting Adam's wife (5)
I believe the answer is:
sieve
'riddle' is the definition.
(thesaurus)
'is upsetting adam's wife' is the wordplay.
'upsetting' is a reversal indicator.
'adam's wife' becomes 'eve' (I've seen this before).
'is' reversed gives 'si'.
'si'+'eve'='SIEVE'
(Other definitions for sieve that I've seen before include "Kitchen strainer" , "Device for separating lumps" , "Screen, sift, strain" , "Straining device" , "Eratosthenes' invention" .)