Nerve needed by head of board when acquiring fuel (7,3)

'fuel' is the definition.
(I know that bottled gas is a type of fuel)

'nerve needed by head of board when' is the wordplay.
'nerve' becomes 'bottle' (I've seen this before).
'needed by' is a charade indicator (letters next to each other).
'head of board' becomes 'DG' (abbreviation for Director General).
'when' becomes 'as' (eg 'when I walked' means 'as I walked').
'bottle'+'dg'+'as'='BOTTLED GAS'

'acquiring' acts as a link.