Pond creatures caught in nets out West! (5)
I believe the answer is:
newts
'pond creatures' is the definition.
(I've seen this in another clue)
'nets out west' is the wordplay.
'out' means one lot of letters goes inside another.
'west' becomes 'W' (abbreviation).
'nets' enclosing 'w' is 'NEWTS'.
'caught in' acts as a link.
(Other definitions for newts that I've seen before include "Kind of water lizards or efts" , "Small amphibians, efts" , "creatures" .)