Decrepit couple on strike (10)
I believe the answer is:
ramshackle
'decrepit' is the definition.
(I've seen this before)
'couple on strike' is the wordplay.
'couple' becomes 'shackle' (I am not sure about this - if you are sure you should give a lot more credence to this answer).
'on' is a charade indicator (letters next to each other).
'strike' becomes 'ram' (I've seen this before).
'shackle' put after 'ram' is 'RAMSHACKLE'.
Can you help me to learn more?
(Other definitions for ramshackle that I've seen before include "Tumbledown" , "Rickety - derelict" , "falling apart" , "In severe disrepair" , "In poor condition" .)