Answer: tanline

AnswerCrossword Clue
TANLINEIt may be hidden under a shirt
TANLINEWhat sunning in a swimsuit leaves
TANLINEStrip at the beach?
TANLINEDark-light separation
TANLINEBikini wearer's giveaway
TANLINEBeach bunny concern
TANLINEMark on a bikini wearer
TANLINEEvidence of sunning
TANLINESunbather's demarcation
TANLINEEvidence of sunbathing
TANLINESomething not seen on a nudist, maybe
TANLINEA lifeguard's whistle might create one
TANLINEWhere brown and white meet
TANLINEResult of incomplete coverage?
TANLINESeparator of light and dark
TANLINENudist's lack
TANLINEIt may fade in winter
TANLINENude sunbather's lack
TANLINEMark caused by a bikini
TANLINESign of browning
TANLINEProof of basking
TANLINEBeach acquisition
TANLINESunbathing evidence
TANLINEBikini wearer's mark
TANLINEBasker's annoyance
TANLINESign of a sunbather