def METHOD_NAME(subsection):
    """
    Retrieves or initializes a cache for a specific subsection.
    Parameters:
        subsection (str): The subsection identifier for the cache.
    Returns:
        dict: The cache data for the specified subsection.
    """
    global cache_data
    if cache_data is None:
        with cache_lock:
            if cache_data is None:
                if not os.path.isfile(cache_filename):
                    cache_data = {}
                else:
                    try:
                        with open(cache_filename, "r", encoding="utf8") as file:
                            cache_data = json.load(file)
                    except Exception:
                        os.replace(cache_filename, os.path.join(script_path, "tmp", "cache.json"))
                        print('[ERROR] issue occurred while trying to read cache.json, move current cache to tmp/cache.json and create new cache')
                        cache_data = {}
    s = cache_data.get(subsection, {})
    cache_data[subsection] = s
    return s