Thanks all for your comments and remedies, I tried a few and these reduced the problems (smoothing, grouping, smoothing polygons which made it worse and changing settings) however looking at the link Laurie sent over, I have come to the conclusion that I need to take this learning curve abit slower, lol I thought it would be easier than it is. 

I really want to make dynamic clothes and give them out in freebies so it's not a case of make do and I need to get it right and I will have to start from scratch and learn a lot more.

I  think I  need to read that thread from start to finish (and make notes of anything I can find here and elsewhere) maybe a new year's resolution as it will probably take me the year to work it out. :/

Cheers to all and happy new year!

Tools:- Win10, Dell XPS8900, ZBrush, Marvelous Designer 11, Hex 2, PSP8. PSP 2019 Ultimate, DAZ Studio, Affinity Photo, Affinity Designer, Filterforge 11, flowscape,  Classic UVMapper, and several headache tablets.