Aground this week on four.
17ac, 'Type of electricity and gas to burn', (4), A???;
39ac, 'Detectives have a warrant, presumably, triggering alarm', (6), D?S?A?. Dismay?
2dn, 'Plant ruins processed ham with equipment out of date', (5,8), M?R?? ?A?I?O?D;
55dn, 'We'll have a word with Maria if she turns up', (E?A).