Having very firm ideas, I got into bed (7)
I believe the answer is:
bigoted
'having very firm ideas' is the definition.
I can't tell whether this defines the answer.
'i got into bed' is the wordplay.
'into' is an insertion indicator.
'i'+'got'='igot'
'igot' going within 'bed' is 'BIGOTED'.
Can you help me to learn more?
(Other definitions for bigoted that I've seen before include "Prejudiced and intolerant" , "I go into debt, being prejudiced" , "Dogmatic" , "Obstinate" , "Refusing to listen to reason" .)