Yank consortium bulldozed American peaks (5,9)
I believe the answer is:
rocky mountains
'yank consortium bulldozed american peaks' is the definition.
I can't tell whether this definition defines the answer.
'bulldozed american peaks' is the wordplay.
'bulldozed american' becomes 'rocky' (I can't explain this - if you can you should give a lot more credence to this answer).
'peaks' becomes 'mountains' (I've seen this before).
'rocky'+'mountains'='ROCKY MOUNTAINS'
Can you help me to learn more?
(Another definition for rocky mountains that I've seen is " American skyscrapers".)