English right invested in consultant influencer (10)
I believe the answer is:
advertiser
'influencer' is the definition.
Both the answer and definition are singular nouns.
Maybe there's an association between them I don't understand?
'english right invested in consultant' is the wordplay.
'english' becomes 'E' (abbreviation as in OED).
'right' becomes 'rt' (abbreviation as in Rt Hon- the Right Honourable).
'invested in' means one lot of letters goes inside another.
'consultant' becomes 'adviser' (synonyms).
'e'+'rt'='ert'
'ert' put within 'adviser' is 'ADVERTISER'.
Can you help me to learn more?
(Other definitions for advertiser that I've seen before include "Part of a newspaper's title" , "who does the plugging" , "Publicist" , "He pushes" , "commercial employee" .)