Squeeze former partner, tense by the sound of it (6)
I believe the answer is:
extort
'squeeze' is the definition.
(I know that squeeze can be written as extort)
'former partner tense by the sound of it' is the wordplay.
'former partner' becomes 'ex' (an ex-partner).
'tense' becomes 't' (abbreviation used in many dictionaries).
'by the sound of it' becomes 'ort' (I am not sure about this - if you are sure you should give a lot more credence to this answer).
'ex'+'t'+'ort'='EXTORT'
Can you help me to learn more?
(Other definitions for extort that I've seen before include "Obtain (money etc) by force" , "Take from by force or threat" , "Get by intimidation" , "Taken from by force or threats" , "Force to fork out" .)