Common as Dotty in Globe (7)
I believe the answer is:
ignoble
'common' is the definition.
(I've seen this in another clue)
'dotty in globe' is the wordplay.
'dotty' indicates anagramming the letters (a mad or 'dotty' version of the letters).
'in'+'globe'='inglobe'
'inglobe' is an anagram of 'IGNOBLE'.
'as' acts as a link.
(Other definitions for ignoble that I've seen before include "Base - in globe (anag)" , "'Far from the madding crowd's . . . . . . . strife'" , "Inferior" , "Lacking dignity" , "Not honourable, low" .)