Hugh's door designed with nails protruding (9)
I believe the answer is:
roughshod
'with nails protruding' is the definition.
(describing horseshoes with nails protruding)
'hugh's door designed' is the wordplay.
'designed' is an anagram indicator (designed with the letters).
'hughs'+'door'='hughsdoor'
'hughsdoor' anagrammed gives 'ROUGHSHOD'.
(Other definitions for roughshod that I've seen before include "the domineering ride it over others" , "Like some horses" , "(Of a horse) given uneven shoes to prevent sliding" , "With horseshoe nails not fully driven home" .)