Catch up with brother in another mile (7)
I believe the answer is:
embroil
'catch up' is the definition.
(I've seen this in another clue)
'brother in another mile' is the wordplay.
'brother' becomes 'bro' (short for brother).
'in' indicates putting letters inside.
'another' indicates an anagram.
'mile' anagrammed gives 'emil'.
'bro' placed inside 'emil' is 'EMBROIL'.
'with' acts as a link.
(Other definitions for embroil that I've seen before include "get into trouble" , "Involve (a person) in some sort of trouble" , "Involve in argument or quarrel" , "Involve or entangle in" , "Involve in trouble - rile mob (anag)" .)