Have a meal in Madrid, inexpensive (4)
I believe the answer is:
dine
'have a meal' is the definition.
(I've seen this in another clue)
'in madrid inexpensive' is the wordplay.
'in' indicates the answer is hidden within the clue.
'DINE' can be found hidden inside 'madrid inexpensive'.
(Other definitions for dine that I've seen before include "Feed" , "Take dinner" , "Take meal" , "Have supper" , "Eat main meal" .)