Expert movement by a learner of marketing (11)
I believe the answer is:
promotional
'expert movement by a learner of marketing' is the definition.
I can't judge whether this definition defines the answer.
'expert movement by a learner' is the wordplay.
'expert' becomes 'pro' (short for professional).
'movement' becomes 'motion' (synonyms).
'by' is a charade indicator (letters next to each other).
'learner' becomes 'l' (as in a learner driver with L-plates on their car).
'pro'+'motion'+'a'+'l'='PROMOTIONAL'
Can you help me to learn more?
(Other definitions for promotional that I've seen before include "Serving to publicise a product" , "helping to sell" , "Encouraging publicity" .)