Class relied on reform to get aircraft squadrons in France (11)

'aircraft squadrons in france' is the definition.
(French term for a type of air squadron)

'class relied on reform' is the wordplay.
'on' is a charade indicator (letters next to each other).
'reform' indicates anagramming the letters (letters in a new form).
'class' after 'relied' is 'reliedclass'.
'reliedclass' with letters rearranged gives 'ESCADRILLES'.

'to get' acts as a link.