Garlicky mayo (5)
I believe the answer is:
aioli
'garlicky mayo' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for aioli that I've seen before include "Garlic 9" , "Mayonnaise seasoned with mayonnaise" , "mayonniase" , "Pungent sauce" , "Garlic-flavoured mayonnaise" .)