Related Clues:

• How one might complain bitterly at having to train over this, perhaps
• You can't believe the one that gets up here to travel by it
• Train on this and inveigh against it
• The line of a bird
• You can't believe what it's like coming back by train
• Train the bird to go over this
• That's the bird for 34 across
• That's the bird a train wil run over
• Letters don't go this way by 6 across
• The sort of bird for training
• Go by them in training
• The bird may get bitter for being run over by the train
• Bird for training?
• The bird for 26 down
• Never with the speed of 10 across and much bulkier (6, 4)