Suggestive remark made by one nun I'd upset (8)
I believe the answer is:
innuendo
'suggestive remark' is the definition.
(I've seen this before)
'one nun i'd upset' is the wordplay.
'upset' is an anagram indicator.
'one'+'nun'+'id'='onenunid'
'onenunid' is an anagram of 'INNUENDO'.
'made by' acts as a link.
(Other definitions for innuendo that I've seen before include "Malicious implication" , "Slur" , "Indirect remark" , "sneaky reference" , "Insinuation - suggestion" .)