Allegation from conservative Americans in lawsuit (10)
I believe the answer is:
accusation
'allegation' is the definition.
(thesaurus)
'conservative americans in lawsuit' is the wordplay.
'conservative' becomes 'C' (UK political abbreviation).
'americans' becomes 'usa' (I can't explain this - if you can you should give a lot more credence to this answer).
'in' means one lot of letters goes inside another.
'lawsuit' becomes 'action' (synonyms).
'c'+'usa'='cusa'
'cusa' inserted into 'action' is 'ACCUSATION'.
'from' is the link.
Can you help me to learn more?
(Other definitions for accusation that I've seen before include "Complaint" , "Charge" .)
