Quarrel said to erupt with sarcastic expression describing Republican (8)
I believe the answer is:
disagree
'quarrel' is the definition.
(I've seen this before)
'said to erupt with sarcastic expression describing republican' is the wordplay.
'to erupt' indicates anagramming the letters.
'with' says to put letters next to each other.
'sarcastic expression' becomes 'gee' (I have seen 'Expression of surprise ' mean 'gee' so perhaps 'expression' could also mean 'gee'. I am not sure about the 'sarcastic' bit.**).
'describing' means one lot of letters goes inside another (describe can mean to form the outline of).
'republican' becomes 'r' (abbreviation).
'said' anagrammed gives 'disa'.
'disa'+'gee'='disagee'
'disagee' placed around 'r' is 'DISAGREE'.
Can you help me to learn more?
(Other definitions for disagree that I've seen before include "Row" , "Have conflicting opinions" , "Express a contrary view" , "Dire ages (anag.)" , "Have a conflicting opinion" .)