Cockney making suggestions about doctor, Unionist, having an affair (10)
I believe the answer is:
intriguing
'cockney making' is the definition.
The definition and answer can be both related to thinking as well as being present participle verbs.
Perhaps there's a link between them I don't understand?
'suggestions about doctor unionist having an affair' is the wordplay.
I cannot quite understand how this works, but
'doctor' could be 'rig' (both can mean to manipulate or tamper with) and 'rig' is present in the answer.
'unionist' could be 'u' (abbreviation as in Democratic Unionist Party) and 'u' is present in the answer.
'an' could be 'i' (Roman numeral for one) and 'i' is located in the answer.
This may be the basis of the clue (or it may be nonsense).
Can you help me to learn more?
(Other definitions for intriguing that I've seen before include "What conspirators are up to" , "Conspiring; fascinating" .)