Honest saint’s honest about answer (8)
I believe the answer is:
straight
'honest' is the definition.
(similar in meaning)
'saint's honest about answer' is the wordplay.
'saint' becomes 'st'.
'honest' becomes 'right' (I can't justify this - if you can you should believe this answer much more).
'about' means one lot of letters goes inside another.
'answer' becomes 'a' (abbreviation eg in Q and A).
'right' placed around 'a' is 'raight'.
'st'+'raight'='STRAIGHT'
Can you help me to learn more?
(Other definitions for straight that I've seen before include "Without curve or bend" , "Poker hand of five consecutive cards" , "Without deviations or curves" , "Honest - direct" , "Without deviation" .)