The point of a dowry (3)
I believe the answer is:
dot
This clue is a double definition.
'the point' is the first definition.
('dot' can be a synonym of 'point')
'a dowry' is the second definition.
(I've seen this in another clue)
'of' is the link.
(Other definitions for dot that I've seen before include "Morse symbol; spot" , "Full stop, period or tittle" , "Spot, speck" , "Small round spot" , "A point, small round mark" .)