Read about a terrible hound in history (9)
I believe the answer is:
roundhead
'history' is the definition.
Although both the answer and definition are singular nouns, I can't understand how one could define the other.
'read about a terrible hound' is the wordplay.
'about' is an insertion indicator.
'a terrible' indicates an anagram.
'hound' with letters rearranged gives 'oundh'.
'read' going around 'oundh' is 'ROUNDHEAD'.
'in' acts as a link.
Can you help me to learn more?
(Other definitions for roundhead that I've seen before include "Parliamentarian (hist.)" , "Cavalier's foe" , "antimonarchist" , "Old soldier" , "An enemy of Charles" .)