Possible Clues:

• Boy with fishing gear, eg lines set on Westminster Bridge
• 'There is another sky' by Emily Dickinson, e.g
• What would Shakespeare make of relative finding one of those similar types in 16 down?
• 'Ozymandias,' e.g
• Sent off over starting outburst and named by the linesman
• One of Shakespeare's 154
• Poem with 140 syllables
• Verse of 14 lines that ends with a couplet
• Any of 154 by Shakespeare
• Tennyson, losing heart, junked poem