CLM and Devops ?

CLM is a set of three applications (Rational Team Concert, Rational Quality Manager and DOORs NG) that offer respectively:
RTC: Source Configuration Management (including build), Planning, Issue tracking
RQM: Ability to define tests cases, test suites and execute them
DOORs NG: Requirement management
In most cases, you install CLM on-premise.

IBM DevOps Services is a cloud-based offering and it offers:
Source Configuration Management with either Jazz SCM or GIT
Code editing in the Web with the Orion editor
Tracking and Planning
Delivery Pipelline (includes building, possibly with with Jenkins, and deploying to BlueMix)

Both offerings support a DevOps strategy.