Well-earnt rest, leisurely accepting support (7)
I believe the answer is:
trestle
'support' is the definition.
(I've seen this before)
'well-earnt rest leisurely accepting' is the wordplay.
'accepting' indicates a hidden word (the answer has been accepted by the clue).
'TRESTLE' is hidden in the letters of 'well earnt rest leisurely'.
(Other definitions for trestle that I've seen before include "Braced support" , "Table support frame" , "Supporting tower" , "Framework to hold table top" , "Supporter" .)