Clue: Volunteers vicar to cut sileage crop (4,5)
Answer: TARE VETCH
Explanation: Definition: sileage crop 
**TA** (Territorial Army, so "volunteers") + **REV** ("vicar") + **ETCH** ("cut") 
*Not sure about this, as I can't find the phrase "tare vetch" in any dictionary online or in my Chambers, which is the 2003 edition.