There once was a woman from Tipperary? Doesn't work in this Irish city (8)

I haven't cracked this one yet — but the brilliant team at Fifteensquared have:

LIMERICK (a LIMERICK is a form of humorous verse with a particular pattern of syllables in each line.  ‘There once was a woman from Tipperary [11 syllables] doesn’t fit the pattern required for the first line, so this doesn’t work for Tipperary [another Irish city]) – this clue ould be classified as double definition