### Clue: Comic verse featuring races for horse and bird (8)
### Answer: DOTTEREL 
 ### Explanation: Definition: bird
 "doggerel"(comic verse) **with**(featuring) TT(abbrev. for for the Tourist Trophy motorcycle races on the Isle of Man) **replacing**(for) "gg"(representation of "gee-gee", informal term in children's usage or in racehorse betting).