New beer knocked back in style (4)
I believe the answer is:
elan
'style' is the definition.
(synonyms)
'new beer knocked back' is the wordplay.
'new' becomes 'n' (common abbreviation eg NT for New Testament).
'beer' becomes 'ale' (I've seen this before).
'knocked back' says the letters should be written backwards.
'n'+'ale'='nale'
'nale' in reverse letter order is 'ELAN'.
'in' is the link.
(Other definitions for elan that I've seen before include "Impressive and energetic style" , "Dash and enthusiasm." , "Dash in France" , "Vitality" , "Flair and dash" .)