That was a stinker - has taken ages and I am finally defeated - viz - 37 across - light gas after cutting a plug up ??E?D; 31 down Insect discovered in a check on one's plants A???T?I and 45 across Source of power one hundred years back in depression S?Y-?E?L I would welcome resolution of these clues if anyone can help (please)
Many thanks Bibblebub - would you agree with my interpretation of 12 down as sink rather than sync (founder of cause to work with another on broadcast) ?