Wine produced in restricted amounts at first (7)
I believe the answer is:
madeira
'wine' is the definition.
(Madeira is an example)
'produced in restricted amounts at first' is the wordplay.
'produced' becomes 'made' ('make' can be a synonym of 'produce').
'at first' indicates taking the first letters.
The initial letters of 'in restricted amounts' is 'ira'.
'made'+'ira'='MADEIRA'
(Other definitions for madeira that I've seen before include "Fortified white wine from island off NW Africa" , "Fortified wine from Atlantic island" , "Portuguese island off northwest Africa" , "Sponge-cake" , "Islands in the Stream?" .)