Suggestion hip party’s crashed by sister filled with energy (8)
I believe the answer is:
innuendo
'suggestion' is the definition.
(I've seen this before)
'hip party's crashed by sister filled with energy' is the wordplay.
'hip party' becomes 'indo' (I can't justify this - if you can you should believe this answer much more).
'crashed by' is an insertion indicator (inserted letters crash into another word).
'sister' becomes 'nun' (sister is a term of address for a nun).
'filled with' means one lot of letters goes inside another.
'energy' becomes 'e' (physics symbol as in E=mcn).
'nun' enclosing 'e' is 'nuen'.
'indo' going around 'nuen' is 'INNUENDO'.
Can you help me to learn more?
(Other definitions for innuendo that I've seen before include "An unpleasant allusion or insinuation" , "Suggestiveness" , "sneaky reference" , "hint" , "Indirect or subtle reference" .)