The most common and most likely answer to this crossword clue is the 7 letter word MODULAR
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The straight part
We know that "made up of several subdivisions" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case made up of several subdivisions = modular.The cryptic/wordplay part
In cryptic crossword there's often an wordplay/cryptic part as well.This part involves a more complex hint, such as an anagram, homophone, hidden word, etc.
Sadly, We don't have an explanation for this specific crossword clue yet.
What does MODULAR mean?
MODULAR adjective- Consisting of separate modules; especially where each module performs or fulfills some specified function and could be replaced by a similar module for the same function, independently of the other modules.
- Of or relating to a module or modules.
- Relating to mode or modulation.