Support for the retired in bad debt — overturned steep charges (7)
I believe the answer is:
bedpost
'support for the retired' is the definition.
(retired can mean gone to bed)
'bad debt overturned steep charges' is the wordplay.
'bad' is an anagram indicator.
'overturned' shows that the letters should be reversed in order.
'steep' becomes 'sop' (both can mean to submerge in liquid).
'charges' indicates putting letters inside (charge can mean to charge into something).
'sop' reversed gives 'pos'.
'debt' is an anagram of 'bedt'.
'bedt' going around 'pos' is 'BEDPOST'.
'in' is the link.
(Other definitions for bedpost that I've seen before include "Upright support found in sleeping chamber" , "Corner support for sleeper" , "On which Lonnie Donegan's chewing gum might have lost its flavour overnight?" , "one possibly sharing our secrets?" , "support in retirement" .)