1) In a photo finish 2) Like an extremely tight race 3) Needing a photo finish 4) Porch-swing posture 5) Too close to call 6) Two-headed race 7) Very close together Found on https://www.crosswordclues.com/clue/neck-and-neck
head-to-headadjective inconclusive as to outcome; close or just even in a race or comparison or competition; `as they approached the finish line they were neck and neck`; `the election was a nip and tuck affair` Found on https://www.encyclo.co.uk/local/20974