Twelve-inch pace? (8)
I believe the answer is:
footstep
'twelve-inch pace?' is the definition.
I can't judge whether this definition defines the answer.
'twelve-inch pace?' is the wordplay.
'twelve-inch' becomes 'foot'.
'pace?' becomes 'step' ('step' can be a synonym of 'pace').
'foot'+'step'='FOOTSTEP'
Can you help me to learn more?
(Other definitions for footstep that I've seen before include "Sound of a step of someone walking" , "Sound of walker" , "Sound of a pace" , "Mark made when walking" .)