Old boy recording upset in boat (6)
I believe the answer is:
pedalo
'boat' is the definition.
(I know that pedalo is a type of boat)
'old boy recording upset' is the wordplay.
'old' becomes 'o' (common abbreviation eg in OE for Old English).
'boy' becomes 'lad' (informal term for boy).
'recording' becomes 'EP' (extended play vinyl record).
'upset' says the letters should be written in reverse.
'o'+'lad'+'ep'='oladep'
'oladep' written backwards gives 'PEDALO'.
'in' acts as a link.
(Other definitions for pedalo that I've seen before include "Type of pleasure boat" , "Small pleasure craft driven by paddles" , "Pleasure craft -- old ape (anag)" , "Paddle boat" , "Man-powered leisure boat" .)