In row D? (3,2,3)
I believe the answer is:
end-to-end
'in row' is the definition.
I don't understand the remainder of the clue.
(Other definitions for end-to-end that I've seen before include "Needn't do (anag.)" , "From start to finish" , "As things are laid to give impression of distance" , "in a continuous sequence" .)