I suppose the answer is not to go a whole week without any, not even the slightest, drop of brain-stimulator.
I've managed most of this but apart from 4D am completely barren in the top left-hand corner.
Could some kind person provide me with the answer for :
1A - Support one position taken by fool up front (10)
??????A???
I'll produce further responses - & any suitable expressions of gratitude - tomorrow.