### Clue: Worth, perhaps, gold in two islands or even more so (1,8)
### Answer: A FORTIORI 
 ### Explanation: Definition: even more so
 [A FORT](an example of which;perhaps is Fort Worth, a city in Texas, USA) + [ OR(the colour of gold in heraldry) **contained in**(in) **two of** I(abbrev. for "island") ].
Answer: As in "if my boss can't do it, then, a fortiori, neither can I".