Northern girl trapping extremely active moles, perhaps

• Moles, say, getting no backing of MI5 without leader
• Moles, extremely active and very visible in Northern Ireland

Wiktionary Word definitions in Wiktionary
n. (en-irregular plural of: naevus )

The Collaborative International Dictionary Word definitions in The Collaborative International Dictionary
Naevus \N[ae]"vus\ (n[=e]"v[u^]s), n.; pl. N[ae]vi (-v[=i]). [L.] (Med.) A spot or mark on the skin of children when born; a birthmark; -- the term includes moles as wells a other types of birthmark, and is most commonly applied to reddish or brownish raised ...

WordNet Word definitions in WordNet
See naevus