Battery in teetotal lock-up (3,4)
I believe the answer is:
dry cell
'battery' is the definition.
(I've seen this before)
'teetotal lock-up' is the wordplay.
'teetotal' becomes 'dry' (synonyms).
'lock-up' becomes 'cell' (I can't justify this - if you can you should give a lot more credence to this answer).
'dry'+'cell'='DRY-CELL'
'in' is the link.
Can you help me to learn more?
(Other definitions for dry cell that I've seen before include "Type of battery" , "Kind of battery used in smaller domestic appliances" , "Healthy accommodation for a prisoner" , "a prisoner's more comfortable with" , "Source of energy" .)