Ratio initially reversed in Carnivora, e.g. wolves (3,4)
I believe the answer is:
low gear
'ratio initially' is the definition.
I can't tell whether this definition defines the answer.
'reversed in carnivora e g wolves' is the wordplay.
'reversed' shows that the letters should be reversed in order.
'in' indicates the answer is hidden within the clue.
'raegwol' is hidden in the letters of 'carnivora e g wolves'.
'raegwol' reversed gives 'LOW GEAR'.
Can you help me to learn more?
(Other definitions for low gear that I've seen before include "which is needed for hills" , "one that suits one crawling along" , "for hill-climbing?" , "one crawls along in?" , "Maxi-skirt" .)