Positive result for Formula One team's head (6)
I believe the answer is:
profit
'positive result' is the definition.
(profitable or advantageous result)
'for formula one team's head' is the wordplay.
'for' becomes 'pro' (as in being 'pro' something).
'formula one' becomes 'FI' (resembles F1).
'head' says to take the initial letters.
The initial letter of 'teams' is 't'.
'pro'+'fi'+'t'='PROFIT'
(Other definitions for profit that I've seen before include "bonus" , "returns" , "Gain from employment of capital" , "financial advantage" , "Use" .)