The term 'apply to' can be defined as to make a formal request for something, such as a job or a loan. The crossword solutions for this term are PERTAIN (7 letters), CONCERN (7 letters), APPROACH (8 letters), DAUB (4 letters), EXERT (5 letters), REFER (5 letters), USEON (5 letters), BEARON (6 letters), BOTHER (6 letters), REGARD (6 letters), and EXERTON (7 letters). These words all have similar meanings to 'apply to', such as to relate to, to be relevant to, to make an effort, to mention, to utilize, to affect, to disturb, to consider, and to put forth effort. All of these words can be used in the context of making a formal request for something.