Much anger having silver taken in again (4)
I believe the answer is:
rage
'much anger' is the definition.
'rage' can be an answer for 'anger' (I've seen this in another clue). I am unsure of the 'much' bit.
'silver taken in again' is the wordplay.
'silver' becomes 'Ag' (Ag is the chemical symbol for silver).
'taken in' is an insertion indicator.
'again' becomes 're' (prefix meaning 'again').
'ag' going inside 're' is 'RAGE'.
'having' acts as a link.
Can you help me to learn more?
(Other definitions for rage that I've seen before include "High dudgeon" , "See red" , "Wrath" , "Gear up in violent temper" , "Fad or anger" .)