These disturbed by a certain direction boil with rage (6)
I believe the answer is:
seethe
'boil with rage' is the definition.
(I've seen this before)
'these disturbed by a certain direction' is the wordplay.
'disturbed' indicates anagramming the letters (the order of letters is disturbed).
'by' means one lot of letters go next to another.
'a certain direction' becomes 'e' (E is an example. I am not sure about the 'certain' bit.).
'these' with letters rearranged gives 'seeth'.
'seeth'+'e'='SEETHE'
Can you help me to learn more?
(Other definitions for seethe that I've seen before include "Be filled with intense but unexpressed anger" , "get very agitated" , "Be livid" , "froth" , "Appear as if boiling" .)