Seconds away from ex-PM, not telling the truth, having a fight (8)

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

T R USS (reference Liz TRUSS [born 1975], UK Prime Minister from 5th September 2022 to 24th October 2022) excluding the second letter (second away) R + L Y ING (not telling the truth) excluding the second letter (second away) Y