Coping partly with limited capital, just under fifteen pounds (8)
I believe the answer is:
capstone
'coping partly' is the definition.
(I know that cope is part of capstone)
'with limited capital just under fifteen pounds' is the wordplay.
'with' means one lot of letters go next to another.
'limited capital' becomes 'cap' (synonyms; 'limited' asks for an abbreviation).
'just under fifteen pounds' becomes 'stone' (there are 14 pounds in a stone).
'cap' put next to 'stone' is 'CAPSTONE'.
(Other definitions for capstone that I've seen before include "Piece on top of wall, etc" , "Part of coping" , "What's put on wall" .)