A poor actor receiving support in Lincoln? (7)
I believe the answer is:
abraham
'lincoln?' is the definition.
('Abraham Lincoln' can be a synonym of 'lincoln')
'a poor actor receiving support' is the wordplay.
'poor actor' becomes 'ham' (I've seen this before).
'receiving' is an insertion indicator.
'support' becomes 'bra' (a support for the breasts).
'a'+'ham'='aham'
'aham' enclosing 'bra' is 'ABRAHAM'.
'in' acts as a link.
(Other definitions for abraham that I've seen before include "Old Testament patriarch" , "first in race" , "Father of all the Jews (7)" , "OT Hebrew patriarch" , "Hebrew father of all the Jews" .)