Sign and bring right back to one (5)
I believe the answer is:
trace
'sign' is the definition.
(thesaurus)
'right back to one' is the wordplay.
'right' becomes 'rt' (abbreviation as in Rt Hon- the Right Honourable).
'back' says the letters should be written in reverse.
'to one' becomes 'ace' (ace has a value of one in some card games).
'rt' reversed gives 'tr'.
'tr'+'ace'='TRACE'
'and bring' is the link.
This may not be correct. Some or all of it may belong to another bit of the clue.
Can you help me to learn more?
(Other definitions for trace that I've seen before include "Discover - modicum" , "Track down or make copy" , "Very small amount that can only just be detected" , "Detect - track" , "Smidgen" .)