Break free, when she gets rid of husband over headland (6)
I believe the answer is:
escape
'break free' is the definition.
(I've seen this before)
'she gets rid of husband over headland' is the wordplay.
'gets rid of' indicates named letters should be taken away.
'husband' becomes 'h'.
'over' shows that the letters should be reversed in order.
'headland' becomes 'cape' (I've seen this before).
'she' with 'h' taken out is 'se'.
'se' backwards is 'es'.
'es'+'cape'='ESCAPE'
'when' is the link.
(Other definitions for escape that I've seen before include "Get free from captivity" , "Get free from confinement or control" , "has to fly" , "Abscond, flee" , "Gain freedom" .)