Filled to capacity (5-1-5)
There are a few possibilities for this:
chock-a-block
'filled to capacity' is the definition.
(I've seen this before)
This is all the clue.
(Other definitions for chock-a-block that I've seen before include "Stuffed full" , "Crammed to capacity" , "Crammed full" , "Quite full" , "Jam-packed" .)
'filled to capacity' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for sated that I've seen before include "given more than enough" , "Stuffed, having had a surfeit" , "Indulged to the full" , "completely filled?" , "fully indulged" .)
(Other definitions for laden that I've seen before include "packed with cargo" , "'Burdened, oppressed (5)'" , "Eland (anag)" , "Heavily loaded" , "Filled (with)" .)