Ultimate in consular assistance for Sally (4)
I believe the answer is:
raid
'sally' is the definition.
(both can mean a military attack)
'ultimate in consular assistance' is the wordplay.
'ultimate in' suggests the final letters.
'assistance' becomes 'aid' (synonyms).
The final letter of 'consular' is 'r'.
'r'+'aid'='RAID'
'for' is the link.
(Other definitions for raid that I've seen before include "Smash-and-grab?" , "Assault, attack" , "Maraud" , "Sudden short attack" , "Foray, sudden attack" .)