I found many of this week's clues quite elliptical. Three that still bother me are:
2D Love note is rubbish? Don't start that! (5)
D _ C _ S
26D The present is so non-U, one admitted (4)
_ _ _ S
27A Bow man has no use for this long tie (5)
_ _ T _ H
(NB The first letter of 27A is the second of 26D)
I believe the answers are:
DUCKS
THIS
HITCH
But quite why I'm not 100% sure. Any suggestions?