Possible Clues:

• The Thunderer covering city in brief may be problematic
• Spiny — difficult and controversial
• Difficult; prickly
• Causing difficulty (like a bed of roses?)
• Full of difficulties
• Difficult Norse god nearly dispensing with earl
• Problematic; spiny
• Bristling with perplexities
• Trying hard to get into ripped jersey at the end
• Troublesome god, extremely nasty