Crossword Genius

Boatman returns with kilo of rock cake (7)

Ross

I believe the answer is:

baklava

I'm a little stuck... Click here to teach me more about this clue!

'cake' is the definition.
The answer and definition can be both things that one consumes for nourishment as well as being singular nouns.
Maybe there's an association between them I don't understand?

'boatman returns with kilo of rock' is the wordplay.
'boatman' becomes 'ab' (abbreviation for able seaman).
'returns' shows that the letters should be reversed in order.
'with' says to put letters next to each other.
'kilo' becomes 'k' (phonetic alphabet: alpha, bravo, charlie etc.).
'of rock' becomes 'lava' (I can't explain this - if you can you should believe this answer much more).
'ab' backwards is 'ba'.
'ba'+'k'+'lava'='BAKLAVA'

Can you help me to learn more?

(Other definitions for baklava that I've seen before include "Sweet thing" , "Middle Eastern dessert of filo pastry, honey and chopped nuts" , "Turkish delight?" , "Pastry filled with nuts and honey" , "Rich Middle Eastern cake with nuts and honey" .)

I've seen this clue in The Guardian.
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