Possible Clues:

• How touching that it should be a charge of only one pound to 'er
• A cautious proposal - sounds touching
• Charge the French, and run a tentative approach
• Tentative proposal of charge on line about to arise
• The hand is used to sound out other's opinions
• Insect's sensory device
• Eg, insect's antenna
• Insect’s 5D
• An insect may smell with one
• Organic antenna