Crossword Genius

Show sluggishness, i.e. train sloppily (7)

Ross

I believe the answer is:

inertia

I'm a little stuck... Click here to teach me more about this clue!

'show sluggishness' is the definition.
'inertia' can be an answer for 'sluggishness' (I've seen this in another clue). I am not sure about the 'show' bit.

'i e train sloppily' is the wordplay.
'sloppily' indicates an anagram (I've seen this in other clues).
'e'+'train'='etrain'
'etrain' with letters rearranged gives 'nertia'.
'i'+'nertia'='INERTIA'

Can you help me to learn more?

(Other definitions for inertia that I've seen before include "Stagnating state" , "Tendency not to act" , "Motionlessness" , "I earn it (anag.)" , "Slowness to take action, state of laziness" .)

I've seen this clue in The Globe and Mail.
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