Related Clues:
- Requiring much effort
- It's hard to make such a dour mixture with us
- Work that's so hard may make one dour in the USA
- Enforcer
- Difficult to lift
- Ponderous
- No walk in the park
- Gruelling, strenuous
- A right pair - useless and exhausting
- Domesticated elephant can start to giggle, given exciting exploratory operation
- A right pair America finds steep
- Difficult to do
- Steep — hard
- Weighty — ponderous
- Discovery of youth attaching metal tag, finally, to tamed elephant?