Arab and Scot producing tumblers (8)
I believe the answer is:
acrobats
'tumblers' is the definition.
('acrobat' can be a synonym of 'tumbler')
'arab and scot producing' is the wordplay.
'and' means one lot of letters go next to another.
'producing' indicates anagramming the letters.
'arab' put after 'scot' is 'scotarab'.
'scotarab' is an anagram of 'ACROBATS'.
(Other definitions for acrobats that I've seen before include "versatile performers" , "Athletic circus performers" , "They perform feats of balance" , "Circus athletes or gymnasts" , "Gymnastic entertainers" .)