How do I solve 16 down in Daily Telegraph Cryptic 31234?

Question

Accepted Answer

16 down reads "Former spouse ringing, celebrating" (9 letters); the answer is EXTOLLING. It's a charade: the answer breaks into parts in clue order, each part clued by a word or short phrase. No indicators needed; watch for standard abbreviations (RA = artist, US = American, IN = at home) and short synonyms. The full step-by-step breakdown is on this page.

Former spouse ringing, celebrating (9)

16D — Former spouse ringing, celebrating (9) — EXTOLLING