Possible Clues:

• Kind of alphabet
• Poet in Czech borders clumsily representing vocal sounds
• One's taken in by fake pitch of speech, from what we hear
• In wrong pitch, person representing sounds
• Pinch toe (anag.)
• Of spelling, corresponding to pronunciation
• Highly acidic jerk expressing nuances of conversation
• Spelled as spoken
• As you say, smooth talker's first to be put in the picture
• Pub notice laid out in this funny-looking alphabet