Thanks Guys ... You definitely nailed it for us. As you say, the answer is in the latest version of Chambers and it's on the web (searching Google Books for 'reed coal enclosure'). However, it is missing from my 1972 edition of Chambers which we had searched thoroughly for R?E?. So maybe it's time we invested in a new copy of Chambers (any advice on whether we should buy a new hardcopy version, pay for access on the web or maybe just rely on Google books and/or other tools ?). We do all the Telegraph crosswords every day and rarely have to resort to a dictionary. It is just this annual 'Giant' crossword that contains some very obscure words for which we have to take the Big Red Book off the shelf and dust it off !
Many Thanks again and Happy New Year to you both.
Cheers
Ron