Moves made by members of the family holding firm after upset (11)

'moves' is the definition.
(I know this)

'members of the family holding firm after upset' is the wordplay.
'members of the family' becomes 'relations' (I've seen this before).
'holding' means one lot of letters goes inside another.
'firm' becomes 'co' (a firm is a company).
'after upset' shows that the letters should be reversed in order (in a down clue, letters go up).
'co' written backwards gives 'oc'.
'relations' going around 'oc' is 'RELOCATIONS'.

'made by' is the link.