Graham Wright, 38, was last seen in Glasgow on 20 August and was reported missing five days later.
A member of the public found his remains near to Rubha Dubh, at Firkin Point, on 13 September.
On Friday, Police Scotland said a 47-year-old woman had been arrested and charged in connection with Mr Wright’s death.
She is expected to appear before Glasgow Sheriff Court later the same day.
Two men have already appeared in the dock earlier this month in connection with the case.
David McColl, 51, has been accused of murder, attempting to defeat the ends of justice, and two counts of breaching bail conditions.
John Roarty, 53, has been accused of attempting to defeat the ends of justice.
Both men made no plea to the charges and were remanded in custody ahead of their next court appearances.
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The major investigation has seen officers carrying out enquiries across the region, including in Glasgow’s Gorbals and Castlemilk areas and in Rutherglen, South Lanarkshire.
A Police Scotland spokesperson said: “Extensive enquiries remain ongoing.”
