Awful extremists bent the truth suggesting they're in league with them (6)
I believe the answer is:
allied
'they're in league with them' is the definition.
The definition suggests an adverb but the answer is not.
'awful extremists bent the truth' is the wordplay.
'extremists' means to remove the middle letters (letters on the extreme ends of the word).
'bent the truth' becomes 'lied' (I've seen this in another clue).
'awful' with its centre taken out is 'al'.
'al'+'lied'='ALLIED'
'suggesting' is the link.
Can you help me to learn more?
(Other definitions for allied that I've seen before include "Joined together for a purpose" , "In league" , "Joined for mutual benefit" , "(Of nations) working together" , "Joined by, eg, treaty" .)