Start being awkward (5)
I believe the answer is:
begin
'start' is the definition.
(I know that begin is a action)
'being awkward' is the wordplay.
'awkward' is an anagram indicator.
'being' anagrammed gives 'BEGIN'.
(Other definitions for begin that I've seen before include "Institute" , "Monachem --" , "Get cracking" , "Partly open" , "Israeli prime minister who shared the Nobel Peace Prize with President Sadat" .)