Possible Clues:

• Hearts may be affected by poem pervading feeling
• Feeling money will come from it, huge power available
• The PM arose, dispersing prevailing mood
• Doctor in spat about present environment
• Pervading mood
• After smashing of the atom, entire globe has had to suffer its pollution
• This woman in racing town cheers returning character
• Feeling present delivered by post, ma excited
• A sympathetic word about Poms suffering in climate
• Setting with leaky moat round