NIV:  Pray that I may proclaim it clearly, as I should.
NAS:  that I may make it clear in the way I ought to speak.
KJV:  That I may make it manifest, as I ought to speak.
GWT:  Pray that I may make this mystery as clear as possible. This is what I have to do.
ASV:  that I may make it manifest, as I ought to speak.
BBE:  So that I may make it clear, as it is right for me to do.
DBY:  to the end that I may make it manifest as I ought to speak.
DRB:  That I may make it manifest as I ought to speak. 
WBS:  That I may make it manifest, as I ought to speak.
WEB:  that I may reveal it as I ought to speak.
YLT:  that I may manifest it, as it behoveth me to speak; 
Holy Bible, New International Version®, NIV® Copyright © 1973, 1978, 1984, 2011 by Biblica, Inc.® Used by permission. All rights reserved worldwide.
New American Standard Bible (NASB) Copyright ©  1960, 1962, 1963, 1968, 1971, 1972, 1973, 1975, 1977, 1995 by The  Lockman Foundation
GOD'S WORD Translation (GWT) Copyright © 1995 by God's Word to the Nations
Bible Hub