Oblique allusion (8)
I believe the answer is:
innuendo
'oblique allusion' is the definition.
(I've seen this before)
This is the entire clue.
(Other definitions for innuendo that I've seen before include "sneaky reference" , "Suggestive remark" , "End union with insinuation" , "Undone in unpleasant insinuation" , "hint" .)