ego invested in dealing an abusive harangue (6)
I believe the answer is:
tirade
'abusive harangue' is the definition.
'tirade' can be an answer for 'harangue' (I've seen this in another clue). I'm unsure of the 'abusive' bit.
'ego invested in dealing' is the wordplay.
'ego' becomes 'I' ('I' in Latin).
'invested in' means one lot of letters goes inside another.
'dealing' becomes 'trade' (trade is a kind of dealing).
'i' inserted into 'trade' is 'TIRADE'.
'an' acts as a link.
Can you help me to learn more?
(Other definitions for tirade that I've seen before include "Torrent of abuse" , "Verbal onslaught" , "Erode or melt (material)" , "Blast of criticism" , "String of invectives" .)