With heavy heart, said farewell into the bargain? (1,4,3)
I believe the answer is:
a good buy
'the bargain?' is the definition.
(I've seen this before)
'with heavy heart said farewell' is the wordplay.
'with heavy heart' becomes 'agood' (I am not sure about this - if you are sure you should give a lot more credence to this answer).
'said' indicates a 'sounds like' (homophone) clue.
'farewell' becomes 'bye' (bye is a kind of farewell).
'bye' sounds like 'buy'.
'agood'+'buy'='A GOOD BUY'
'into' is the link.
Can you help me to learn more?
(Another definition for a good buy that I've seen is " One bargain".)