Chide for throwing beer over union king (6)
I believe the answer is:
rebuke
'chide' is the definition.
(I know that chide can be written as rebuke)
'throwing beer over union king' is the wordplay.
'throwing' indicates an anagram (letters get thrown around).
'over' is an insertion indicator.
'union' becomes 'U' (common abbreviation as in 'Trades Union Congress').
'king' becomes 'K' (chess abbreviation).
'beer' is an anagram of 'rebe'.
'u'+'k'='uk'
'rebe' placed around 'uk' is 'REBUKE'.
'for' is the link.
(Other definitions for rebuke that I've seen before include "Censure" , "Reprove sternly" , "Admonish, chide" , "Express sharp disapproval" , "Sharply criticize" .)