'Common' Arabs maybe seen wandering about (5,5)
I believe the answer is:
horse sense
'common' is the definition.
(both can mean common sense)
'arabs maybe seen wandering about' is the wordplay.
'arabs maybe' becomes 'horses' (Arab is a type of horse).
'wandering about' indicates an anagram (I've seen this in other clues).
'seen' anagrammed gives 'ense'.
'horses'+'ense'='HORSE SENSE'
(Other definitions for horse sense that I've seen before include "Gumption" , "Nous" , "Sound practical judgement" , "Practical judgment" , "Practical wisdom" .)