Something useful to an angler with a dinghy? (8)
I believe the answer is:
'something useful to' is the definition.
I can't tell whether this definition defines the answer.
'angler with a dinghy?' is the wordplay.
'angler' becomes 'hook' (I am not sure about this - if you are sure you should believe this answer much more).
'with' is a charade indicator (letters next to each other).
'a dinghy?' becomes 'boat' (dinghy is a kind of boat).
'hook' put after 'boat' is 'BOATHOOK'.
'an' acts as a link.
Can you help me to learn more?
(Another definition for boathook that I've seen is " Push off with this".)