Hi Lizzie. You will find help for these clues on another thread- but here goes with some help.
34. is 5 consecutive letters found within the clue
48. Iron = fe put in the middle of another word for constructing
54. The diver is a bird the spelling of which is reversed (returned) and ''in charge = ic. This gives you the letters for an angram
56. is an anagram
68.Truck is a type of lorry, track is to do with the railway so take two letters from that word . Biggest clue comes from the last 7 words - think of a song.
Hope this helps.