End to end? (3)
(Other definitions for less that I've seen before include "Fewer; minus" , "Minus; not so much" , "Comparatively little" , "A smaller amount" , "So-called St James" .)
'end to end?' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for ing that I've seen before include "Northern meadow" , "Innocent artless young women on stage" .)