Interested spectator ripped rev's robe (8)
I believe the answer is:
observer
'interested spectator' is the definition.
'observer' can be an answer for 'spectator' (I've seen this before). I'm unsure of the 'interested' bit.
'ripped rev's robe' is the wordplay.
'ripped' is an anagram indicator (letters ripped or torn up).
'revs'+'robe'='revsrobe'
'revsrobe' anagrammed gives 'OBSERVER'.
Can you help me to learn more?
(Other definitions for observer that I've seen before include "One watching attentively" , "monitor" , "I notice" , "One who watches" , "organ on Sunday" .)