Boast about making a shoe without any leather (5)
I believe the answer is:
sabot
'a shoe without any leather' is the definition.
(wooden shoe)
'boast about' is the wordplay.
'about' is an anagram indicator.
'boast' with letters rearranged gives 'SABOT'.
'making' is the link.
(Other definitions for sabot that I've seen before include "Wooden clog" , "This from last" , "Boast about wooden shoe" , "French wooden shoe" , "footwear from Paris" .)