Transported over great distances? Incredible! (3-7)
I believe the answer is:
far-fetched
'incredible' is the definition.
(I've seen this before)
'transported over great distances?' is the wordplay.
'transported' becomes 'fetched' (fetching is a kind of transporting).
'over' means one lot of letters goes inside another.
'great distances?' becomes 'arf' (I can't justify this - if you can you should give a lot more credence to this answer).
'fetched' going around 'arf' is 'FAR-FETCHED'.
Can you help me to learn more?
(Other definitions for far-fetched that I've seen before include "Highly implausible" , "Unlikely" , "Incredible" , "(Tale) hard to believe" , "Forced - unconvincing" .)