The subtle insinuation from union movement accommodating wind-up (8)
I believe the answer is:
innuendo
'the subtle insinuation' is the definition.
'innuendo' can be an answer for 'insinuation' ('innuendo' can be a synonym of 'insinuation'). I am unsure of the 'the subtle' bit.
'union movement accommodating wind-up' is the wordplay.
'movement' indicates anagramming the letters.
'accommodating' means one lot of letters goes inside another.
'wind-up' becomes 'end' (I am not sure about this - if you are sure you should believe this answer much more).
'union' is an anagram of 'innuo'.
'innuo' enclosing 'end' is 'INNUENDO'.
'from' is the link.
Can you help me to learn more?
(Other definitions for innuendo that I've seen before include "An unpleasant insinuation or intimation" , "Oblique allusion" , "An unpleasant allusion or insinuation" , "Aspersion" , "suggested" .)