Market feel is a first hand appreciation of how buyers operate, the dynamics of business meetings, what your competitors are doing and potential obstacles to market entry.
Sound market research will encompass intelligence from people who are streetwise and can convey market knowledge in a practical fashion. This includes descriptions of the types of buyers you will meet, how they negotiate, cultural factors in business dealings and a flavour of the market environment.
Try to gain a sense of how business is done by speaking to companies with experience. Attending seminars on “How to do Business” in various countries really helps.