Old rocking chair put in empty attic (7)
I believe the answer is:
archaic
'old' is the definition.
('archaic' can be similar in meaning to 'old')
'rocking chair put in empty attic' is the wordplay.
'rocking' indicates anagramming the letters.
'put in' is an insertion indicator.
'empty' means to remove the middle letters.
'attic' with its middle removed is 'ac'.
'chair' is an anagram of 'rchai'.
'rchai' inserted inside 'ac' is 'ARCHAIC'.
(Other definitions for archaic that I've seen before include "Very old or old-fashioned" , "Behind the times" , "Antiquated" , "Ancient, no longer current" , "From the past" .)