Clear latitude during Prohibition to get source of tequila (7)
I believe the answer is:
blatant
'clear' is the definition.
'latitude during prohibition to get source of tequila' is the wordplay.
'latitude' becomes 'lat'.
'during' indicates putting letters inside.
'prohibition' becomes 'ban' (ban is a kind of prohibition).
'to get' means one lot of letters go next to another.
'source of' says to take the initial letters.
The first letter of 'tequila' is 't'.
'lat' placed within 'ban' is 'blatan'.
'blatan'+'t'='BLATANT'
(Other definitions for blatant that I've seen before include "Unashamed, flagrant" , "Without any attempt at concealment" , "Offensively obvious" , "Very obvious and without shame" , "Glaringly obvious" .)