Hide the real problem (7)
I believe the answer is:
leather
'hide' is the definition.
(I've seen this before)
'the real problem' is the wordplay.
'problem' indicates an anagram.
'the'+'real'='thereal'
'thereal' with letters rearranged gives 'LEATHER'.
(Other definitions for leather that I've seen before include "Thrash" , "A tanner produces it from hide" , "Dressed skin" , "kid, perhaps" , "Beat" .)