A couple of boys in lock-up get something to eat (7)
I believe the answer is:
cabbage
'something to eat' is the definition.
(cabbage is a kind of food)
'a couple of boys in lock-up' is the wordplay.
'couple of' says to double the letters.
'boys' becomes 'b' (this could be a standard abbreviation which I don't know about).
'in' is an insertion indicator.
'lock up' becomes 'cage' (I've seen this in another clue).
'b' doubled is 'bb'.
'a'+'bb'='abb'
'abb' put inside 'cage' is 'CABBAGE'.
'get' is the link.
Can you help me to learn more?
(Other definitions for cabbage that I've seen before include "Vegetable plant" , "Savoy vegetable" , "Variety of brassica" , "Green vegetable" , "Main ingredient of sauerkraut" .)