European shares claw back some ground after sell-off
* FTSEurofirst 300 up 1.7 pct
* Syngenta surges on sign of better Monsanto offer
* FTSEurofirst still set for worst month since 2002
* Chinese shares slump again
* Goldman Sachs strategists cut equities position
By Sudip Kar-Gupta
LONDON, Aug 25 (Reuters) - European shares rose on Tuesday, recovering some poise after a sharp sell-off the previous day on concerns about China's economy that saw around 450 billion euros ($520 billion) wiped off the value of leading stocks.
The pan-European FTSEurofirst 300 index, which slumped 5.4 percent on Monday, rose 1.8 percent, while the euro zone's blue-chip Euro STOXX 50 index gained 1.6 percent.
Swiss agricultural chemicals maker Syngenta was the best-performing FTSEurofirst stock, rising 7 percent after a source said Monsanto had sweetened a takeover. Continuación...