Take your chances with fish I deem dodgy! (5,4)
I believe the answer is:
carpe diem
'take your chances' is the definition.
I can't tell whether this defines the answer.
'fish i deem dodgy' is the wordplay.
'fish' becomes 'carp' (carp is a kind of fish).
'dodgy' indicates an anagram (a dodgy or wrong order of the letters).
'i'+'deem'='ideem'
'ideem' is an anagram of 'ediem'.
'carp'+'ediem'='CARPE DIEM'
'with' is the link.
Can you help me to learn more?
(Other definitions for carpe diem that I've seen before include "make the most of today" , "Gather ye rosebuds" , "Make the most of the present" , "Enjoy the moment! (Latin)" , "'Seize the day'" .)