Milky drink second son fed to bard (6)
I believe the answer is:
posset
'milky drink' is the definition.
'posset' can be an answer for 'drink' (posset is a kind of drink). I'm not sure about the 'milky' bit.
'second son fed to bard' is the wordplay.
'second' becomes 's' (common abbreviation).
'son' becomes 's' (genealogical abbreviation for son).
'fed to' is an insertion indicator.
'bard' becomes 'poet' (I've seen this in another clue).
's'+'s'='ss'
'ss' put within 'poet' is 'POSSET'.
Can you help me to learn more?
(Other definitions for posset that I've seen before include "Sweet spiced milk curdled with alcohol" , "So step on curdled milk once used as a cold remedy" , "Curdled milk drink" , "As relief for cold" .)