Social worker finds an isolated person outside front of museum (7)
I believe the answer is:
almoner
'social worker' is the definition.
(almoner is a kind of social worker)
'an isolated person outside front of museum' is the wordplay.
'an' becomes 'a'.
'isolated person' becomes 'loner' (I've seen this before).
'outside' means one lot of letters goes inside another.
'front of' suggests taking the first letters.
The first letter of 'museum' is 'm'.
'loner' placed around 'm' is 'lmoner'.
'a'+'lmoner'='ALMONER'
'finds' is the link.
(Other definitions for almoner that I've seen before include "Hospital social worker" , "One dispensing charity" , "Official giving out aid" , "Former officer giving relief to the poor" , "Former social worker" .)