Thanks Jono. I thought it must be that, but still think it's a pretty poor clue. Would anyone really consider a single letter and another three as 'constituents' of a four-letter word?
Good day all. Enjoyed today's. Very satisfying when a first run through does not get me many answers, then a few down clues give crossers, and a second run through starts to fill gaps. Cannot parse 19. Any offers?