Nearly an hour of play was lost with the session also beginning 10 minutes late after injured Clarke returned to the crease with a heavily strapped back on this second morning, thanks to painkilling injections.
Clarke resumed his innings on 60 and was batting on 85 not out (117 balls, 13 fours) with Smith, who was unbeaten on 98 runs (171 balls, 14 fours) when rain stopped play.
Mohammad Shami got the day's play underway and first-up Ishant Sharma was his attack partner on day two. But the two medium-pacers repeated the mistakes made on day one morning, bowling short of length and wide off stumps, giving the batsmen too much room to play.
The resultant was a clutch of boundaries, five within the first four overs.
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The most disappointing bit was that the bowlers were making no efforts to trouble Clarke, who was batting under distress and appeared to be in some pain. Yet the captain managed to play his strokes and score at a fast pace, adding 25 runs off 33 balls he faced this morning.
At the other end, Smith was also in hurry to steal runs as the second new ball was still hard and the bowling appeared listless and without direction. He added 26 runs to his overnight tally.