A weekend with a girl, afloat (5)

I believe the answer is:

kayak

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'a weekend with a girl afloat' is the definition.
I can't tell whether this definition defines the answer.

'a weekend with a girl' is the wordplay.
'weekend' becomes 'k' (I've seen this in other clues).
'with' means one lot of letters go next to another.
'a girl' becomes 'Kay'.
'a'+'k'='ak'
'ak' after 'kay' is 'KAYAK'.

Can you help me to learn more?

(Other definitions for kayak that I've seen before include "A small covered canoe" , "Inuit craft" , "Small canoe used by Eskimo" , "Inuit canoe" , "Type of canoe" .)

I've seen this clue in the Evening Standard.

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