Exploit empty fuel vessels, say — wanting lead for electric vehicles? (4,6)

I haven't cracked this one yet — but the brilliant team at Fifteensquared have:

MILK (exploit) + F[ue]L + [b]OATS (vessels, say, minus initial letter – lead) We don’t see many of these delivering milk these days but they are now put to different uses: in my area, we have a very colourful, eco-friendly greengrocery example