Trump extremely liable to be disturbing (6)
I believe the answer is:
ruffle
'be disturbing' is the definition.
I can't judge whether this defines the answer.
'trump extremely liable' is the wordplay.
'trump' becomes 'ruff' (synonyms).
'extremely' says to hollow out the word (remove centre letters) (only the extremes of the word are used).
'liable' with its middle removed is 'le'.
'ruff'+'le'='RUFFLE'
'to' is the link.
Can you help me to learn more?
(Other definitions for ruffle that I've seen before include "Upset the composure of" , "Cause (feathers) to stand up" , "Ornamental frill; make disarranged" , "Disturb or upset, say feathers" , "Disturb the evenness of feelings or feathers" .)