Right cable held by pair (6)
I believe the answer is:
proper
'right' is the definition.
(I know that right can be written as proper)
'cable held by pair' is the wordplay.
'cable' becomes 'rope' (I've seen this before).
'held by' indicates putting letters inside.
'pair' becomes 'pr' (abbreviation).
'rope' placed within 'pr' is 'PROPER'.
(Other definitions for proper that I've seen before include "Appropriate according to rules" , "Authentic" , "Conventional" , "Right, correct or appropriate" , "Genuine; respectable" .)