Concealed English leather (4)
I believe the answer is:
hide
'leather' is the definition.
(thesaurus)
'concealed english' is the wordplay.
'concealed' becomes 'hid' ('hide' can be a synonym of 'conceal').
'english' becomes 'e' (abbreviation).
'hid'+'e'='HIDE'
(Other definitions for hide that I've seen before include "Shelter" , "Not show" , "mask" , "Pelt; conceal" , "Bury" .)