Independent brought in Writers Working Allowance (7)
I believe the answer is:
pension
'allowance' is the definition.
(thesaurus)
'independent brought in writers working' is the wordplay.
'independent' becomes 'i'.
'brought in' means one lot of letters goes inside another.
'writers' becomes 'pens' (writing implements).
'working' becomes 'on' (e.g. a machine is working or on).
'pens'+'on'='penson'
'i' going within 'penson' is 'PENSION'.
(Other definitions for pension that I've seen before include "Retirement pay in a Continental boarding-house" , "Payment to traitor" , "Retired person's allowance" , "residence abroad" , "Payment to retired persons a continental boarding house" .)