Crossword Genius

Cocky type later horsing around aboard boat (5,5)

Ross

I believe the answer is:

smart aleck

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

'cocky type' is the definition.
The answer and definition can be both people as well as being singular nouns.
Maybe there's an association between them I don't understand?

'later horsing around aboard boat' is the wordplay.
'horsing around' is an anagram indicator (I've seen 'horses around' mean this).
'aboard' indicates putting letters inside.
'boat' becomes 'smack' (smack is a kind of sailing vessel).
'later' with letters rearranged gives 'rtale'.
'rtale' going into 'smack' is 'SMART-ALECK'.

Can you help me to learn more?

(Other definitions for smart aleck that I've seen before include "Upstart" , "Know-all" , "Wise guy" .)

I've seen this clue in The Times.
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