Get on a bit clumsily (6)
I believe the answer is:
obtain
'get' is the definition.
('obtain' can be a synonym of 'get')
'on a bit clumsily' is the wordplay.
'clumsily' indicates anagramming the letters.
'on'+'a'+'bit'='onabit'
'onabit' anagrammed gives 'OBTAIN'.
(Other definitions for obtain that I've seen before include "'Get, acquire (6)'" , "Hold good" , "Get or receive" , "Take possession of" , "Get or lay hold of" .)