Delight head of section (credit control) (8)
I believe the answer is:
joystick
'control' is the definition.
(aircraft control)
'delight head of section credit' is the wordplay.
'delight' becomes 'joy' (synonyms).
'head of' suggests taking the first letters.
'credit' becomes 'tick' (I've seen this before).
The initial letter of 'section' is 's'.
'joy'+'s'+'tick'='JOYSTICK'
(Other definitions for joystick that I've seen before include "girl's to click" , "Manual computer game gadget" , "Flight control lever" , "Aircraft's control lever" , "Pilot's manual control" .)