Determined to reverse round a bend? (3)
I believe the answer is:
out
'determined' is the definition.
'to reverse round a bend?' is the wordplay.
'reverse' shows that the letters should be reversed in order.
'round' indicates putting letters inside.
'a bend?' becomes 'U' (a U-bend is a kind of bend - pipe under sink).
'to' written backwards gives 'ot'.
'ot' placed around 'u' is 'OUT'.
(Other definitions for out that I've seen before include "Escaped" , "SECOND PART OF 11" , "Known" , "See 19" , "Dismissed, in cricket" .)