HOWDY AGAIN
Yes,kAREN,I see 21a clearly now although it is not a word with which I am familiar,regional perhaps (barryl.... in your native land).
So,
Stacks of buildings containing goods=
Oodles of garden huts with stuff inside=
in large quanties=.h.d.o.d.
Now,still in critical mood,lets look at 12a,
the first of the phrase for'to make fitter' is surely 'lick'but again this may be regional although Chamber's has it as 'lick'.
Otherwise this was a good puzzle with some nice witty clues.
Sorry if I sound a bit of an anorak, but you've got to laugh!
HOPE ALL ARE WELL
NUFF SAID
TIMES TEN
WJ