Narrative:

Departing runway on flight from ZZZ to ZZZ1 cleaning up the aircraft led #3 failed to retract which caused a slight roll of the aircraft. After reducing aircraft speed; doing appropriate checklist and emergency was declared. Aircraft returned to ZZZ for an overweight landing without further incident.

Google
 

Original NASA ASRS Text

Title: A B737 FLT CREW EXPERIENCED A SLIGHT ROLL AFTER TAKEOFF WHEN A LEADING EDGE DEVICE FAILED TO RETRACT. THEY DECLARED AN EMERGENCY AND RETURNED TO DEP ARPT TO LAND.

Narrative: DEPARTING RWY ON FLT FROM ZZZ TO ZZZ1 CLEANING UP THE ACFT LED #3 FAILED TO RETRACT WHICH CAUSED A SLIGHT ROLL OF THE ACFT. AFTER REDUCING ACFT SPD; DOING APPROPRIATE CHKLIST AND EMER WAS DECLARED. ACFT RETURNED TO ZZZ FOR AN OVERWT LNDG WITHOUT FURTHER INCIDENT.

Data retrieved from NASA's ASRS site as of May 2009 and automatically converted to unabbreviated mixed upper/lowercase text. This report is for informational purposes with no guarantee of accuracy. See NASA's ASRS site for official report.