Suggestion of union having struggle to adopt resolution (8)
I believe the answer is:
innuendo
'suggestion' is the definition.
(I've seen this before)
'of union having struggle to adopt resolution' is the wordplay.
I cannot really see how this works, but
'of' could be 'o' and 'o' is found in the answer.
'union' could be 'u' (common abbreviation as in 'Trades Union Congress') and 'u' is found in the answer.
'resolution' could be 'end' (I've seen this before) and 'end' is found within the answer.
The remaining letters 'inn' is a valid word which might be clued in a way I don't see.
This may be the basis of the clue (or it may be nonsense).
Can you help me to learn more?
(Other definitions for innuendo that I've seen before include "Malicious suggestion" , "suggested" , "Aspersion" , "derogatory reference" , "Indirect remark" .)