Possibly bar succeeded attracting pensioner (4)
I believe the answer is:
soap
'possibly bar' is the definition.
(as in a bar of soap)
'succeeded attracting pensioner' is the wordplay.
'succeeded' becomes 's' (genealogical abbreviation).
'attracting' says to put letters next to each other.
'pensioner' becomes 'OAP' (old age pensioner).
's'+'oap'='SOAP'
(Other definitions for soap that I've seen before include "Sudsy TV show?" , "cake?" , "Long running TV series" , "If soft, it's used to flatter" , "Washing substance" .)