Instruction to waken besetting minute little sleeper (8)
I believe the answer is:
dormouse
'little sleeper' is the definition.
The answer and definition can be both animals as well as being singular nouns.
I also know that 'little' relates to this answer.
'instruction to waken besetting minute' is the wordplay.
'instruction' becomes 'do' (I am not sure about this - if you are sure you should give a lot more credence to this answer).
'to waken' becomes 'rouse' (I've seen this before).
'besetting' is an insertion indicator.
'minute' becomes 'm' (abbreviation).
'rouse' placed around 'm' is 'rmouse'.
'do'+'rmouse'='DORMOUSE'
Can you help me to learn more?
(Other definitions for dormouse that I've seen before include "Small bushy-tailed rodent" , "Alice tea party creature" , "Creature in teapot (Alice)" , "Ditto" , "Small rodent that hibernates in winter" .)