On board facilities for leaders (5)
I believe the answer is:
heads
This could be a double definition.
'on board facilities' is the first definition.
'heads' can be an answer for 'facilities' (head is a kind of facility). I am not sure about the 'on board' bit.
'leaders' is the second definition.
(head is a kind of leader)
'for' acts as a link.
Can you help me to learn more?
(Other definitions for heads that I've seen before include "Noddles; nuts" , "Goes for" , "Obverse of a coin" , "Obverse result of coin-tossing" , "a 50-50 chance" .)