The term 'ostensibly be' can be summarized as seeming to be something, but not necessarily being that thing. It is often used to describe a situation where someone appears to be doing one thing, but is actually doing something else. For example, someone may ostensibly be working on a project, but in reality they are procrastinating. The crossword solution for this term is 'SEEM', which accurately captures the idea of appearing to be something without actually being it.