Away from home, time to wear dead crumpled old hat (8)
I believe the answer is:
outdated
'old hat' is the definition.
(I've seen this before)
'away from home time to wear dead crumpled' is the wordplay.
'away from home' becomes 'out' ('out' can be a synonym of 'away from home').
'time' becomes 't'.
'to wear' indicates putting letters inside.
'crumpled' indicates anagramming the letters.
'dead' anagrammed gives 'daed'.
't' inserted inside 'daed' is 'dated'.
'out'+'dated'='OUTDATED'
(Other definitions for outdated that I've seen before include "Obsolete, antiquated" , "Old-fashioned" , "to be ignoring fashion" , "Pass" , "No longer valid or fashionable" .)