Hmmm... Knowing Denis I suspect this clue relates in some way to the previous one.
The only thing I can come up with is "COUNTING" but I can't see how to get the g at the end.
Add = count
one = i
and = n (as in Fish 'n Chips)
... second thoughts
unless it's a double definition?
_________________________
Everyone is entitled to be stupid, but some abuse the privilege.