Clue: What Hamlet was reading: several worthless poets? (5,5,5)
Answer: WORDS WORDS WORDS
Explanation: Definition: What Hamlet was reading
Hamlet's reply when Polonius asks him what he is reading (Act 2 Scene 2, leading up to the famous quote "Though this be madness, yet there is method in't". The 'poet' is, of course WORDS[worth]. A fitting companion to 25A.