Secure last bit and have a drink? (4)
I believe the answer is:
pint
'a drink?' is the definition.
(pint is a unit of liquid volume)
'secure last bit' is the wordplay.
'secure' becomes 'pin' (pinning is a kind of securing).
'last' says to take the final letters.
The last letter of 'bit' is 't'.
'pin'+'t'='PINT'
'and have' acts as a link.
I am not very happy about this link. Some or all of it may be part of another bit of the clue.
Can you help me to learn more?
(Other definitions for pint that I've seen before include "Quantity" , "small amount" , "Half a quart" , "Glass of beer (colloq.)" , "The working man's drink measure" .)