A pal in New York tipping one crude source (5)
I believe the answer is:
dubai
'crude source' is the definition.
(source of crude oil)
'a pal in new york tipping one' is the wordplay.
'pal in new york' becomes 'bud' (primarily US term for a friend).
'tipping' says the letters should be written in reverse.
'one' becomes 'i' (Roman numeral).
'a'+'bud'='abud'
'abud' in reverse letter order is 'duba'.
'duba'+'i'='DUBAI'
(Other definitions for dubai that I've seen before include "Port city of UAE" , "Gulf territory" , "Middle East destination" , "Gulf emirate and port city" , "Port city on the Persian Gulf" .)