Left frequently in the attic (4)
I believe the answer is:
loft
'attic' is the definition.
(synonyms)
'left frequently' is the wordplay.
'left' becomes 'l' (common abbreviation).
'frequently' becomes 'oft' (synonyms).
'l'+'oft'='LOFT'
'in the' acts as a link.
(Other definitions for loft that I've seen before include "Place for keeping racing pigeons" , "Space under barn roof for storing hay" , "Throw up; pigeon house" , "Uppermost room" , "Room At The Top" .)