Drive from A to B with mini, erratically (8)
I believe the answer is:
ambition
'drive' is the definition.
(ambition is a kind of drive)
'a to b with mini erratically' is the wordplay.
'with' says to put letters next to each other.
'erratically' indicates an anagram.
'to'+'b'='tob'
'tob' after 'mini' is 'minitob'.
'minitob' is an anagram of 'mbition'.
'a'+'mbition'='AMBITION'
'from' acts as a link.
(Other definitions for ambition that I've seen before include "A determination to succeed" , "Strong desire to achieve, fame or fortune" , "Strong drive for success" , "Objective" , "Desire to succeed in the world" .)