Help when yours truly goes after second position (10)
I believe the answer is:
assistance
'help' is the definition.
('assistance' can be a synonym of 'help')
'when yours truly goes after second position' is the wordplay.
'when' becomes 'as'.
'yours truly' becomes 'i'.
'goes after' means one lot of letters go next to another.
'second' becomes 's' (common abbreviation).
'position' becomes 'stance' (stance is a kind of position**).
'i' put after 's' is 'si'.
'as'+'si'+'stance'='ASSISTANCE'
(Other definitions for assistance that I've seen before include "Aid" , "Support" , "Help" .)