Rustic East Anglian leaders wear peculiar pants (7)
I believe the answer is:
peasant
'rustic' is the definition.
(peasant is a kind of rustic)
'east anglian leaders wear peculiar pants' is the wordplay.
'leaders' says to take the initial letters.
'wear' is an insertion indicator (to wear something is to be covered up by it).
'peculiar' is an anagram indicator (I've seen this in other clues).
The first letters of 'east anglian' is 'ea'.
'pants' anagrammed gives 'psant'.
'ea' going inside 'psant' is 'PEASANT'.
(Other definitions for peasant that I've seen before include "Poor smallholder" , "Revolting person" , "Lowly tiller of land" , "Poor worker on the land" , "rude fellow" .)