I ruminate about small copy (9)
I believe the answer is:
miniature
'small copy' is the definition.
'miniature' can be an answer for 'copy' (I have seen 'Tiny copy ' mean 'miniature' so perhaps 'copy' could also mean 'miniature'). I'm not sure about the 'small' bit.
'i ruminate about' is the wordplay.
'about' indicates anagramming the letters.
'i'+'ruminate'='iruminate'
'iruminate' is an anagram of 'MINIATURE'.
Can you help me to learn more?
(Other definitions for miniature that I've seen before include "illuminated letter" , "Small-scale version" , "Tiny replica" , "Smaller than normal" , "Of a much smaller size than usual" .)