Almonds one scattered around mountains produce fruit (7,3,6)

'fruit' is the definition.
(oranges and lemons are fruit)

'almonds one scattered around mountains' is the wordplay.
'scattered' indicates anagramming the letters.
'around' means one lot of letters goes inside another.
'mountains' becomes 'ranges' (mountain ranges).
'almonds'+'one'='almondsone'
'almondsone' anagrammed gives 'oandlemons'.
'oandlemons' going around 'ranges' is 'ORANGES AND LEMONS'.

'produce' acts as a link.