Current head of government turning into wino — that's awkward! (7)
I believe the answer is:
lumpish
'awkward' is the definition.
(thesaurus)
'current head of government turning into wino' is the wordplay.
'current' becomes 'I' (symbol for electric current).
'head of government' becomes 'pm' (I've seen this in other clues).
'turning' says the letters should be written in reverse.
'into' indicates putting letters inside.
'wino' becomes 'lush' (both can mean a drunk).
'i'+'pm'='ipm'
'ipm' back-to-front is 'mpi'.
'mpi' inserted within 'lush' is 'LUMPISH'.
'that's' is the link.
(Other definitions for lumpish that I've seen before include "misshapen" , "Ungainly" .)