Help because one is after second position (10)
I believe the answer is:
assistance
'help' is the definition.
('assistance' can be a synonym of 'help')
'because one is after second position' is the wordplay.
'because' becomes 'as' (I've seen this in other clues).
'one' becomes 'i' (Roman numeral).
'is after' is a charade indicator (letters next to each other).
'second' becomes 's' (common abbreviation).
'position' becomes 'stance' (stance is a kind of position**).
'i' after 's' is 'si'.
'as'+'si'+'stance'='ASSISTANCE'
(Other definitions for assistance that I've seen before include "Aid" , "Help" , "Support" .)