Spawning place for radical daughter (4)
I believe the answer is:
rudd
'spawning place' is the definition.
I can't judge whether this definition defines the answer.
'radical daughter' is the wordplay.
'radical' becomes 'rud' (I can't justify this - if you can you should give a lot more credence to this answer).
'daughter' becomes 'd' (genealogical abbreviation).
'rud'+'d'='RUDD'
'for' acts as a link.
Can you help me to learn more?
(Other definitions for rudd that I've seen before include "Red-eye fish" , "Swimmer" , "Freshwater fish of the carp family" , "European freshwater fish" , "Freshwater fish (silvery with red fins)" .)