Thanks, boreas - I'd got 'ibadat' right away when I put the 'b' (from 'Alban') in. Had to stop this to entertain visitors - am just getting back to it (my grid's almost full but my brain is empty re the theme!).
There's a flaw in this puzzle, isn't there, because you can identify the "five letter" clue and the spaces, and hence submit the answer without any idea as to what it's about?