Grant is like Leo? (6)
I believe the answer is:
assign
'grant' is the definition.
(I've seen this before)
'like leo?' is the wordplay.
'like' becomes 'as'.
'leo?' becomes 'sign' (leo is a kind of sign).
'as'+'sign'='ASSIGN'
'is' is the link.
(Other definitions for assign that I've seen before include "Delegate" , "Allocate or transfer" , "Give a task to" , "Attribute" , "Determine" .)