Butter up King by redeveloping sad regent's fruit and veg plots (6,7)

'plots' is the definition.
(market garden is a kind of plot)

'butter up king by redeveloping sad regent's' is the wordplay.
'butter' becomes 'ram' (a ram is something which 'butts').
'up' is a reversal indicator (in down clue: letters go upwards).
'king' becomes 'K' (chess abbreviation).
'by' means one lot of letters go next to another.
'redeveloping' is an anagram indicator (I've seen 'redeveloped' mean this).
'ram' reversed gives 'mar'.
'sad'+'regent'='sadregent'
'sadregent' anagrammed gives 'etgardens'.
'mar'+'k'+'etgardens'='MARKET-GARDENS'

'fruit and veg' is the link.
I am not very happy about this link. Some or all of it may be part of another bit of the clue.

Can you help me to learn more?