Sucker bringing fleet onto beach (9)
I believe the answer is:
quicksand
'sucker' is the definition.
(something which sucks)
'fleet onto beach' is the wordplay.
'fleet' becomes 'quick' (I am not sure about this - if you are sure you should give a lot more credence to this answer).
'onto' is a charade indicator (letters next to each other).
'beach' becomes 'sand'.
'quick'+'sand'='QUICKSAND'
'bringing' is the link.
Can you help me to learn more?
(Other definitions for quicksand that I've seen before include "Treacherous situation (which sucks people and things down)" , "Treacherous situation that can trap and destroy" , "Treacherous terrain" , "Ground which sucks!" , "Treacherous wet area that swallows things up" .)