ひっかけ橋 is a bridge in Osaka. Its real name is 戎(えびす)橋.
ひっかけ is the act of ひっかける(引っ掛ける).
引っ掛ける has many meanings but in this case it means to "hit on somebody".
戎橋ではナンパ(this is also slang)が多いためひっかけ橋と呼ばれます。
It's not so much the sport or martial art of sword-fighting, but "Chanbara" comes from the sound made when two sword baldes collide, and it means (at least it used to mean) TV shows and movies about samurai where there might be swordfighting scenes. E.g., "Zenigata Heiji", "Yojimbo", etc.
Yes. Without the "ru" the kanji alone would be read "ryuukou" as an adjective, so they just add the "ru" and make it an "irregular reading" Kanji (as I call it)
Other examples of irregulars are:
omiyage (お土産) Looks like "odosan"
okami (女将)-san Looks like "Joshou"
inaka (田舎) You would think the word is "Ta" something because of 田
Yes, but your link states "漢字の本来の意味とは関係なくその音や訓を借りてあてはめた漢字".
In the examples I gave above, the Kanjis do have the same meaning as the "irregular" pronunciation.
omiyage (お土産) Looks like "odosan"
okami (女将)-san Looks like "Joshou"
inaka (田舎) You would think the word is "Ta" something because of 田
anata (貴方) Looks like "ki kata"; actually, "kihou" is an accepted but rarely used pronunciation
Hmm, in my kanji reference book it says that kanji that are used for meaning only with nonstandard readings are also considered to be ateji, but the daijirin disagrees. Interesting. Now I'm not sure what to make of this... :?