Adam Webster is poised for a switch to Ipswich Town.
And the deal will involve Matt Clarke and a transfer fee coming to Fratton Park in exchange.
Tractor Boys boss Mick McCarthy has moved to strengthen his defence with a swoop for the highly-regarded Webster.
The 21-year-old has just enjoyed his finest season yet at the Blues, finally establishing himself in his preferred position of centre back.
Now he is poised to move to the Championship, with Paul Cook tempted to do business having been offered Clarke and cash as part of the deal.
Central defender Clarke made 34 appearances and scored once during a season-long loan from Portman Road, on occasions partnering Webster.
The clubs are currently tying up the transfer as Cook seeks to bolster his squad in the early part of the close season.