Resistance soldier makes a wild harangue (4)
I believe the answer is:
rant
'a wild harangue' is the definition.
(I've seen this in another clue)
'resistance soldier' is the wordplay.
'resistance' becomes 'r' (electronics abbreviation).
'soldier' becomes 'ant' (soldier is a type of ant).
'r'+'ant'='RANT'
'makes' is the link.
(Other definitions for rant that I've seen before include "Show anger" , "Talk wildly or violently" , "Harangue, rave" , "Speak intemperately" , "Talk wildly, harangue" .)