Possible Clues:

• You get H from Esso for this, by the sound of it
• Scathing criticism - sulphuric acid
• Sulphuric acid; malicious criticism
• Chamber group beset by mostly shameful and hostile criticism
• Vicious criticism of musical group among numbers of Romans
• Don, DJ, rock film-maker and one-time B.A.D. member
• Sulphuric acid or caustic criticism
• Bitter words from wise men, say, in small village
• Group overwhelmed by no end of unpleasant slander?
• Scathing language