The term LEAD-IN TO PHOBIA can be solved by the crossword solutions AGGORA (6 letters), ACRO (4 letters), and AGORA (5 letters). AGGORA is a combination of the words 'AGORAPHOBIA' and 'agora, ' which is an ancient Greek marketplace. ACRO is a combination of the words 'ACROPHOBIA' and 'acronym, ' which is a word formed from the initial letters of other words. Finally, AGORA is a combination of the words 'PHOBIA' and 'agora, ' which is an ancient Greek marketplace. All three solutions refer to a fear or PHOBIA of something, and the lead-in to that fear is either an acronym or an ancient Greek marketplace.