The crossword solution for the term 'allow for, with 'IN'' is 'FACTOR'. The phrase 'allow for' means to make room or provide an opportunity for something. When used with the word 'IN', it suggests that something needs to be taken into account or considered when making a decision. A FACTOR is something that influences a decision or outcome, so this phrase could be used to describe the process of taking something into account when making a decision.