Family members ignoring large, round donation for congressmen? (15)
I believe the answer is:
representatives
'congressmen?' is the definition.
('representative' can be a synonym of 'congressman')
'family members ignoring large round donation' is the wordplay.
'family members' becomes 'relatives'.
'ignoring' suggests deleting specific letters.
'large' becomes 'l'.
'round' indicates putting letters inside.
'donation' becomes 'present' (I've seen this before**).
'relatives' with 'l' taken away is 'reatives'.
'reatives' placed around 'present' is 'REPRESENTATIVES'.
'for' acts as a link.
(Other definitions for representatives that I've seen before include "Officers" , "MPs!" , "10 [HOUSE] of these in US" .)