Returning skint upset somewhat original world tourist (7)
I believe the answer is:
sputnik
'original world tourist' is the definition.
Although both the answer and definition are singular nouns, I cannot understand how they can define each other.
'returning skint upset somewhat' is the wordplay.
'returning' shows that the letters should be reversed in order.
'somewhat' says the answer is hidden in the clue.
'kintups' is hidden within 'skint upset'.
'kintups' back-to-front is 'SPUTNIK'.
Can you help me to learn more?
(Other definitions for sputnik that I've seen before include "Soviet satellite, launched 1957" , "Soviet space orbiter" , "High-flier" , "used to encircle the globe" , "UK pints (anag)" .)