Incentive for movement around one milk tank (10)
I believe the answer is:
motivation
'incentive' is the definition.
(thesaurus)
'movement around one milk tank' is the wordplay.
'movement' becomes 'motion' (synonyms).
'around' means one lot of letters goes inside another.
'one' becomes 'i' (Roman numeral).
'milk tank' becomes 'vat' (type of container. I am not sure about the 'milk' bit.).
'i'+'vat'='ivat'
'motion' placed around 'ivat' is 'MOTIVATION'.
'for' is the link.
Can you help me to learn more?
(Another definition for motivation that I've seen is " Push".)