Infant's footwear (6)
I believe the answer is:
bootee
'infant's footwear' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for bootee that I've seen before include "Soft, woolly baby's shoe" , "Knitted foot-covering" , "Baby's footwear" , "Baby's woollen shoe" , "Infant's shoe." .)