State definitely it's the little turning on the right (4)
I believe the answer is:
aver
'state definitely' is the definition.
'aver' can be an answer for 'state' (both can mean to declare). I am not sure about the 'definitely' bit.
'the little turning on the right' is the wordplay.
'the little turning' becomes 'ave' (I can't justify this - if you can you should give a lot more credence to this answer).
'on' says to put letters next to each other (in a down clue, letters appear on others).
'the right' becomes 'r' (abbreviation).
'ave'+'r'='AVER'
'it's' is the link.
Can you help me to learn more?
(Other definitions for aver that I've seen before include "Firmly maintain" , "State firmly, propound" , "State firmly, declare" , "'Affirm, assert (4)'" , "claim" .)