Try this (PP2014 - I think the option's only in the Pro versions, and a recent update at that?):

Select the figure you're trying to conform to, do Figure > Spawn Full Body Morph..., and give the morph a name starting with an exclamation mark (e.g. "!MyFBM"). A new morph will be added to the figure's set to zero. Don't touch it.

Load the clothing item and conform it, then do Figure > Copy Morphs From..., and select ONLY the FBM you just spawned (starting the name with an ! means it appears at the top of the list - that just makes it easy to find)

Dial the newly added "!MyFBM" morph on the BODY actor of the clothing to 1.0, and it should fit much better. Note: If the clothing has already picked up some super-conforming morphs from the figure you may have to dial those back to zero.

More details on the "Tips/Tricks/Tools for getting the best fit of clothes to the body - Suggestions and help with general ways of getting the best fit of clothing items to the bodies" thread over in CGbytes Poser forum, post #20 onwards - here's a link to post #21 of that thread http://www.cgbytes.com/community/forums.aspx?g=posts&t=115158&p=2#post125269

(N.B. The above link should be okay according this https://www.renderosity.com/mod/forumpro/?thread_id=2901266&#msg4263735 - "Or like in your example a member may have gone through an ordeal and had it solved and should point their fellow member to what fixed it for them. I would put this on the scale of education/assistance/info the same would apply if the process was on YouTube etc." Having to justify an external link when I'm trying to help somebody is a total PITA ! )

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The 3Dcheapskate (also available in DAZ and HiveWire3D flavours) occasionally posts sensible stuff. Usually by accident.
And it usually uses Poser 11, with units set to inches. Except when it's using Poser 6 or PP2014, or when its units are set to PNU.