Tons transported after noon - work uninterrupted (7)
I believe the answer is:
nonstop
'uninterrupted' is the definition.
(I've seen this before)
'tons transported after noon work' is the wordplay.
'transported' indicates anagramming the letters.
'after' says to put letters next to each other.
'noon' becomes 'n' (abbreviation for noon).
'work' becomes 'op' (short for opus).
'tons' anagrammed gives 'onst'.
'onst' after 'n' is 'nonst'.
'nonst'+'op'='NONSTOP'
(Other definitions for nonstop that I've seen before include "Ceaselessly" , "Never pausing" , "Round-the-clock, unceasing" , "Going straight from A to B" , "without a break" .)