25 across
Less
important
call
when
14
(6)
Less important call when 14 (6)
hints
0
checks
0
hints
The definition is at the beginning of the clue.
How the clue works
The definition is Less important, giving FRINGE (as in fringe interests or fringe events). The wordplay relies on a cross-reference: "when 14" points to the answer to clue 14 across, which is IRONCLAD. IRON gives the chemical symbol FE, and CLAD means "enveloping" — so FE wraps around RING (meaning "call"), giving F-RING-E.